Fusion

It could be a memory leak but there is no way for you to determine that. The best advice I can offer is to post the log files found in the VM's bundle folder so that the community can see if there's anything that points to a cause. 

What build of Windows are you running in the VM? 

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

I've been looking through the logs and have a couple of questions:

You have several entries in the .vmx file that are not present in mine (nor are they included by default).

sched.mem.max = "10240"sched.mem.min = "2048"sched.mem.maxmemctl = "8192"sched.mem.pshare.enable = "TRUE"MemTrimRate = "0"mainMem.useNamedFile = "FALSE"prefvmx.minVmMemPct = "50"isolation.tools.memSchedFakeSampleStats.disable = "FALSE"

Did you insert these? If so, why? They appear to be intended for a VMware product that runs the VMware hypervisor (e.g. vSphere/ESXi) and Fusion runs using the Apple hypervisor. 

Are you running with any snapshots active? (It doesn't look like it, but wanted to ask to make sure).

If you disable 3D support for the VM, does this still happen?

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

It could be a memory leak but there is no way for you to determine that. The best advice I can offer is to post the log files found in the VM's bundle folder so that the community can see if there's anything that points to a cause. 

What build of Windows are you running in the VM? 

Since RAM consumption has been continuously increasing uncontrollably, this AI asked me to add these lines. My problem persisted even before these lines were added. Currently, even when I add `mks.enable3d = "FALSE"` with 3D support disabled, my RAM usage still appears high. Even now, without understanding how it happened, it shows 220GB usage, but it doesn't stop the VM. I don't understand what this means. What should my settings be for the most efficient VM usage on a device with 48GB RAM and an M3 Max processor? Thanks for your interest 

I've been looking through the logs and have a couple of questions:

You have several entries in the .vmx file that are not present in mine (nor are they included by default).

sched.mem.max = "10240"sched.mem.min = "2048"sched.mem.maxmemctl = "8192"sched.mem.pshare.enable = "TRUE"MemTrimRate = "0"mainMem.useNamedFile = "FALSE"prefvmx.minVmMemPct = "50"isolation.tools.memSchedFakeSampleStats.disable = "FALSE"

Did you insert these? If so, why? They appear to be intended for a VMware product that runs the VMware hypervisor (e.g. vSphere/ESXi) and Fusion runs using the Apple hypervisor. 

Are you running with any snapshots active? (It doesn't look like it, but wanted to ask to make sure).

If you disable 3D support for the VM, does this still happen?

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

I would take any AI generated answer for a problem with VMware Fusion with a large grain of salt (that is, don't treat it as an accurate answer).  It most likely will reply with advice for ESXi which may be irrelevant for Fusion. Check the sources that the AI is using in its answer generation before doing anything.

What you're seeing is very unusual -- I don't have any "magic incantations" that I can recommend to fix the issue or optimize use of the product because we don't know what the issue really is. For the majority of us, Fusion works fine out of the box without runaway memory utilization. That's why we're going to need some Broadcom folks to weigh in on this if they're listening. 

Some random thoughts:

Do you have hard drive buffering enabled for this VM's Advanced settings. Try turning that off.

Are you using multiple monitors? Try using only 1. 

Since RAM consumption has been continuously increasing uncontrollably, this AI asked me to add these lines. My problem persisted even before these lines were added. Currently, even when I add `mks.enable3d = "FALSE"` with 3D support disabled, my RAM usage still appears high. Even now, without understanding how it happened, it shows 220GB usage, but it doesn't stop the VM. I don't understand what this means. What should my settings be for the most efficient VM usage on a device with 48GB RAM and an M3 Max processor? Thanks for your interest 

I've been looking through the logs and have a couple of questions:

You have several entries in the .vmx file that are not present in mine (nor are they included by default).

sched.mem.max = "10240"sched.mem.min = "2048"sched.mem.maxmemctl = "8192"sched.mem.pshare.enable = "TRUE"MemTrimRate = "0"mainMem.useNamedFile = "FALSE"prefvmx.minVmMemPct = "50"isolation.tools.memSchedFakeSampleStats.disable = "FALSE"

Did you insert these? If so, why? They appear to be intended for a VMware product that runs the VMware hypervisor (e.g. vSphere/ESXi) and Fusion runs using the Apple hypervisor. 

Are you running with any snapshots active? (It doesn't look like it, but wanted to ask to make sure).

If you disable 3D support for the VM, does this still happen?

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

It could be a memory leak but there is no way for you to determine that. The best advice I can offer is to post the log files found in the VM's bundle folder so that the community can see if there's anything that points to a cause. 

What build of Windows are you running in the VM? 

I've experienced a similar memory leak issue, I've reported it internally, and they are trying to figure out if they can reproduce the issue now to be able to debug it.

I would take any AI generated answer for a problem with VMware Fusion with a large grain of salt (that is, don't treat it as an accurate answer).  It most likely will reply with advice for ESXi which may be irrelevant for Fusion. Check the sources that the AI is using in its answer generation before doing anything.

What you're seeing is very unusual -- I don't have any "magic incantations" that I can recommend to fix the issue or optimize use of the product because we don't know what the issue really is. For the majority of us, Fusion works fine out of the box without runaway memory utilization. That's why we're going to need some Broadcom folks to weigh in on this if they're listening. 

Some random thoughts:

Do you have hard drive buffering enabled for this VM's Advanced settings. Try turning that off.

Are you using multiple monitors? Try using only 1. 

Since RAM consumption has been continuously increasing uncontrollably, this AI asked me to add these lines. My problem persisted even before these lines were added. Currently, even when I add `mks.enable3d = "FALSE"` with 3D support disabled, my RAM usage still appears high. Even now, without understanding how it happened, it shows 220GB usage, but it doesn't stop the VM. I don't understand what this means. What should my settings be for the most efficient VM usage on a device with 48GB RAM and an M3 Max processor? Thanks for your interest 

I've been looking through the logs and have a couple of questions:

You have several entries in the .vmx file that are not present in mine (nor are they included by default).

sched.mem.max = "10240"sched.mem.min = "2048"sched.mem.maxmemctl = "8192"sched.mem.pshare.enable = "TRUE"MemTrimRate = "0"mainMem.useNamedFile = "FALSE"prefvmx.minVmMemPct = "50"isolation.tools.memSchedFakeSampleStats.disable = "FALSE"

Did you insert these? If so, why? They appear to be intended for a VMware product that runs the VMware hypervisor (e.g. vSphere/ESXi) and Fusion runs using the Apple hypervisor. 

Are you running with any snapshots active? (It doesn't look like it, but wanted to ask to make sure).

If you disable 3D support for the VM, does this still happen?

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

I would take any AI generated answer for a problem with VMware Fusion with a large grain of salt (that is, don't treat it as an accurate answer).  It most likely will reply with advice for ESXi which may be irrelevant for Fusion. Check the sources that the AI is using in its answer generation before doing anything.

What you're seeing is very unusual -- I don't have any "magic incantations" that I can recommend to fix the issue or optimize use of the product because we don't know what the issue really is. For the majority of us, Fusion works fine out of the box without runaway memory utilization. That's why we're going to need some Broadcom folks to weigh in on this if they're listening. 

Some random thoughts:

Do you have hard drive buffering enabled for this VM's Advanced settings. Try turning that off.

Are you using multiple monitors? Try using only 1. 

Since RAM consumption has been continuously increasing uncontrollably, this AI asked me to add these lines. My problem persisted even before these lines were added. Currently, even when I add `mks.enable3d = "FALSE"` with 3D support disabled, my RAM usage still appears high. Even now, without understanding how it happened, it shows 220GB usage, but it doesn't stop the VM. I don't understand what this means. What should my settings be for the most efficient VM usage on a device with 48GB RAM and an M3 Max processor? Thanks for your interest 

I've been looking through the logs and have a couple of questions:

You have several entries in the .vmx file that are not present in mine (nor are they included by default).

sched.mem.max = "10240"sched.mem.min = "2048"sched.mem.maxmemctl = "8192"sched.mem.pshare.enable = "TRUE"MemTrimRate = "0"mainMem.useNamedFile = "FALSE"prefvmx.minVmMemPct = "50"isolation.tools.memSchedFakeSampleStats.disable = "FALSE"

Did you insert these? If so, why? They appear to be intended for a VMware product that runs the VMware hypervisor (e.g. vSphere/ESXi) and Fusion runs using the Apple hypervisor. 

Are you running with any snapshots active? (It doesn't look like it, but wanted to ask to make sure).

If you disable 3D support for the VM, does this still happen?

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

It could be a memory leak but there is no way for you to determine that. The best advice I can offer is to post the log files found in the VM's bundle folder so that the community can see if there's anything that points to a cause. 

What build of Windows are you running in the VM? 

I reverted the configurations created by AI, so the VM is now running with the settings it had when it was first created. The hard drive buffering value was set to Automatic. I disabled it and checked, but the RAM value continues to rise. Even if I don't perform any operations on the VM, the RAM usage continues to increase and never decreases. I don't know what to do about this. Thanks for support 

Original Message:
Sent: Dec 17, 2025 09:22 PM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

I would take any AI generated answer for a problem with VMware Fusion with a large grain of salt (that is, don't treat it as an accurate answer).  It most likely will reply with advice for ESXi which may be irrelevant for Fusion. Check the sources that the AI is using in its answer generation before doing anything.

What you're seeing is very unusual -- I don't have any "magic incantations" that I can recommend to fix the issue or optimize use of the product because we don't know what the issue really is. For the majority of us, Fusion works fine out of the box without runaway memory utilization. That's why we're going to need some Broadcom folks to weigh in on this if they're listening. 

Some random thoughts:

Do you have hard drive buffering enabled for this VM's Advanced settings. Try turning that off.

Are you using multiple monitors? Try using only 1. 

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Dec 17, 2025 05:41 PM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Since RAM consumption has been continuously increasing uncontrollably, this AI asked me to add these lines. My problem persisted even before these lines were added. Currently, even when I add `mks.enable3d = "FALSE"` with 3D support disabled, my RAM usage still appears high. Even now, without understanding how it happened, it shows 220GB usage, but it doesn't stop the VM. I don't understand what this means. What should my settings be for the most efficient VM usage on a device with 48GB RAM and an M3 Max processor? Thanks for your interest 

Original Message:
Sent: Dec 17, 2025 10:51 AM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

I've been looking through the logs and have a couple of questions:

You have several entries in the .vmx file that are not present in mine (nor are they included by default).

sched.mem.max = "10240"sched.mem.min = "2048"sched.mem.maxmemctl = "8192"sched.mem.pshare.enable = "TRUE"MemTrimRate = "0"mainMem.useNamedFile = "FALSE"prefvmx.minVmMemPct = "50"isolation.tools.memSchedFakeSampleStats.disable = "FALSE"

Did you insert these? If so, why? They appear to be intended for a VMware product that runs the VMware hypervisor (e.g. vSphere/ESXi) and Fusion runs using the Apple hypervisor. 

Are you running with any snapshots active? (It doesn't look like it, but wanted to ask to make sure).

If you disable 3D support for the VM, does this still happen?

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Dec 17, 2025 05:55 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

I don't think you can do much to be honest, I tried everything as well, but nothing stops Fusion from bloating the mem at the moment. I do power off the vm regularly, and power it back on, just to start from 0 again.

Original Message:
Sent: Dec 18, 2025 06:33 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

I reverted the configurations created by AI, so the VM is now running with the settings it had when it was first created. The hard drive buffering value was set to Automatic. I disabled it and checked, but the RAM value continues to rise. Even if I don't perform any operations on the VM, the RAM usage continues to increase and never decreases. I don't know what to do about this. Thanks for support 

Original Message:
Sent: Dec 17, 2025 09:22 PM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

I would take any AI generated answer for a problem with VMware Fusion with a large grain of salt (that is, don't treat it as an accurate answer).  It most likely will reply with advice for ESXi which may be irrelevant for Fusion. Check the sources that the AI is using in its answer generation before doing anything.

What you're seeing is very unusual -- I don't have any "magic incantations" that I can recommend to fix the issue or optimize use of the product because we don't know what the issue really is. For the majority of us, Fusion works fine out of the box without runaway memory utilization. That's why we're going to need some Broadcom folks to weigh in on this if they're listening. 

Some random thoughts:

Do you have hard drive buffering enabled for this VM's Advanced settings. Try turning that off.

Are you using multiple monitors? Try using only 1. 

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Dec 17, 2025 05:41 PM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Since RAM consumption has been continuously increasing uncontrollably, this AI asked me to add these lines. My problem persisted even before these lines were added. Currently, even when I add `mks.enable3d = "FALSE"` with 3D support disabled, my RAM usage still appears high. Even now, without understanding how it happened, it shows 220GB usage, but it doesn't stop the VM. I don't understand what this means. What should my settings be for the most efficient VM usage on a device with 48GB RAM and an M3 Max processor? Thanks for your interest 

Original Message:
Sent: Dec 17, 2025 10:51 AM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

I've been looking through the logs and have a couple of questions:

You have several entries in the .vmx file that are not present in mine (nor are they included by default).

sched.mem.max = "10240"sched.mem.min = "2048"sched.mem.maxmemctl = "8192"sched.mem.pshare.enable = "TRUE"MemTrimRate = "0"mainMem.useNamedFile = "FALSE"prefvmx.minVmMemPct = "50"isolation.tools.memSchedFakeSampleStats.disable = "FALSE"

Did you insert these? If so, why? They appear to be intended for a VMware product that runs the VMware hypervisor (e.g. vSphere/ESXi) and Fusion runs using the Apple hypervisor. 

Are you running with any snapshots active? (It doesn't look like it, but wanted to ask to make sure).

If you disable 3D support for the VM, does this still happen?

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Dec 17, 2025 05:55 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

I am attaching the log files and Windows version information below. Thank you very much for your interest and support.

Same problem here. Fresh install of VMWare 25, no custom configs.
M4 Mac Pro.
The thing eats up through all of my 48 gigs of ram in around 40 minutes.

It's very sad to hear this. I hope the source of this problem is identified and resolved as soon as possible :(

FWIW, I'm on a MacBook Pro M3 Max with 128 GB memory. Current OS, VMWare & Windows builds. Not seeing this issue. >>knock wood<<
OP said you were on, "MacOS Version 15.7.3 (24G419)" I'm on macOS Tahoe 26.2. Maybe it's time to upgrade from Sequoia?

Original Message:
Sent: Dec 21, 2025 05:03 PM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

It's very sad to hear this. I hope the source of this problem is identified and resolved as soon as possible :(

FWIW, I'm on a MacBook Pro M3 Max with 128 GB memory. Current OS, VMWare & Windows builds. Not seeing this issue. >>knock wood<<
OP said you were on, "MacOS Version 15.7.3 (24G419)" I'm on macOS Tahoe 26.2. Maybe it's time to upgrade from Sequoia?

It's very sad to hear this. I hope the source of this problem is identified and resolved as soon as possible :(

There doesn't seem to be any update for my m3 max processor device. Is there anything else I need to do for this?

FWIW, I'm on a MacBook Pro M3 Max with 128 GB memory. Current OS, VMWare & Windows builds. Not seeing this issue. >>knock wood<<
OP said you were on, "MacOS Version 15.7.3 (24G419)" I'm on macOS Tahoe 26.2. Maybe it's time to upgrade from Sequoia?

It's very sad to hear this. I hope the source of this problem is identified and resolved as soon as possible :(

Unfortunately we're going to have to wait for Broadcom to respond. It's likely that there's something with 25H2 going on here, so it's probably not something that an Apple update is going to address (that is, unless Apple has broken something).

@Duncan Epping (who's tagged as a Broadcom Employee) has stated that the issue has been reported internally. 

------------------------------
- Paul (technogeezer)
vExpert 2025
------------------------------


Original Message:
Sent: Dec 22, 2025 10:21 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

There doesn't seem to be any update for my m3 max processor device. Is there anything else I need to do for this?

Original Message:
Sent: Dec 22, 2025 09:50 AM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

FWIW, I'm on a MacBook Pro M3 Max with 128 GB memory. Current OS, VMWare & Windows builds. Not seeing this issue. >>knock wood<<
OP said you were on, "MacOS Version 15.7.3 (24G419)" I'm on macOS Tahoe 26.2. Maybe it's time to upgrade from Sequoia?

Original Message:
Sent: Dec 21, 2025 05:03 PM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

It's very sad to hear this. I hope the source of this problem is identified and resolved as soon as possible :(

Original Message:
Sent: Dec 20, 2025 08:33 PM
From: Ihar Andreyeu
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Same problem here. Fresh install of VMWare 25, no custom configs.
M4 Mac Pro.
The thing eats up through all of my 48 gigs of ram in around 40 minutes.

Unfortunately we're going to have to wait for Broadcom to respond. It's likely that there's something with 25H2 going on here, so it's probably not something that an Apple update is going to address (that is, unless Apple has broken something).

@Duncan Epping (who's tagged as a Broadcom Employee) has stated that the issue has been reported internally. 

There doesn't seem to be any update for my m3 max processor device. Is there anything else I need to do for this?

FWIW, I'm on a MacBook Pro M3 Max with 128 GB memory. Current OS, VMWare & Windows builds. Not seeing this issue. >>knock wood<<
OP said you were on, "MacOS Version 15.7.3 (24G419)" I'm on macOS Tahoe 26.2. Maybe it's time to upgrade from Sequoia?

It's very sad to hear this. I hope the source of this problem is identified and resolved as soon as possible :(

Same problem here. Fresh install of VMWare 25, no custom configs.
M4 Mac Pro.
The thing eats up through all of my 48 gigs of ram in around 40 minutes.

thanks for all, I will follow updates.

Original Message:
Sent: Dec 22, 2025 05:15 PM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Unfortunately we're going to have to wait for Broadcom to respond. It's likely that there's something with 25H2 going on here, so it's probably not something that an Apple update is going to address (that is, unless Apple has broken something).

@Duncan Epping (who's tagged as a Broadcom Employee) has stated that the issue has been reported internally. 

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Dec 22, 2025 10:21 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

There doesn't seem to be any update for my m3 max processor device. Is there anything else I need to do for this?

Original Message:
Sent: Dec 22, 2025 09:50 AM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

FWIW, I'm on a MacBook Pro M3 Max with 128 GB memory. Current OS, VMWare & Windows builds. Not seeing this issue. >>knock wood<<
OP said you were on, "MacOS Version 15.7.3 (24G419)" I'm on macOS Tahoe 26.2. Maybe it's time to upgrade from Sequoia?

Original Message:
Sent: Dec 21, 2025 05:03 PM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

It's very sad to hear this. I hope the source of this problem is identified and resolved as soon as possible :(

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Thank you very much for your interest and quick response. Could you share the contents of the vmx file in txt format for reference? Perhaps there are issues with some of our definitions. Happy New Year!

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Thank you very much for your interest and quick response. Could you share the contents of the vmx file in txt format for reference? Perhaps there are issues with some of our definitions.

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

As I don't know what data is in the file, I'm reluctant to do so.

Thank you very much for your interest and quick response. Could you share the contents of the vmx file in txt format for reference? Perhaps there are issues with some of our definitions.

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

it is just configuration data of the VM itself, nothing that would allow anyone to access your VM etc.

As I don't know what data is in the file, I'm reluctant to do so.

Thank you very much for your interest and quick response. Could you share the contents of the vmx file in txt format for reference? Perhaps there are issues with some of our definitions.

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

My vmx file is unedited but my virtual machine is very old (it has upgraded from windows 7 to 10 to 11).  With windows 11 I was forced to add the trusted platform module and encrypt everything.  It is my understanding that I now I cannot even edit or view the vmx file without unencrypting, which requires removing the trusted platform module, which would destroy the windows 11 virtual machine.  

Original Message:
Sent: Jan 05, 2026 10:20 AM
From: Duncan Epping
Subject: VMWare Fusion 25H2 With M3 Memory Leak

it is just configuration data of the VM itself, nothing that would allow anyone to access your VM etc.

Original Message:
Sent: Jan 05, 2026 09:33 AM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

As I don't know what data is in the file, I'm reluctant to do so.

Original Message:
Sent: Jan 05, 2026 07:18 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Thank you very much for your interest and quick response. Could you share the contents of the vmx file in txt format for reference? Perhaps there are issues with some of our definitions.

Original Message:
Sent: Dec 31, 2025 12:25 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

If you chose partial encryption for that VM (the recommended setting for a Windows 11 VM in Fusion 13 and later), the .vmx file is in plain text (unencrypted).

Removing the TPM device then unencrypting a fully encrypted VM does not destroy the VM. If you used BitLocker encryption for the VM, you need to have the recovery key and knowing how to use it before continuing. Then remove the TPM device, decrypt the VM, do whatever you need to, re-encrypt, then add back the TPM device. Then treat the situation as if the TPM had been corrupted on a physical PC. If you didn't use  BitLocker, just power on the PC and be prepared to follow prompts to reset your Windows Hello PIN if you used one. If ypu did use BitLocker, now would be the time to perform recovery to allow the VM to access the disk. 

------------------------------
- Paul (technogeezer)
vExpert 2025
------------------------------


Original Message:
Sent: Jan 05, 2026 02:01 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

My vmx file is unedited but my virtual machine is very old (it has upgraded from windows 7 to 10 to 11).  With windows 11 I was forced to add the trusted platform module and encrypt everything.  It is my understanding that I now I cannot even edit or view the vmx file without unencrypting, which requires removing the trusted platform module, which would destroy the windows 11 virtual machine.  

Original Message:
Sent: Jan 05, 2026 10:20 AM
From: Duncan Epping
Subject: VMWare Fusion 25H2 With M3 Memory Leak

it is just configuration data of the VM itself, nothing that would allow anyone to access your VM etc.

Original Message:
Sent: Jan 05, 2026 09:33 AM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

As I don't know what data is in the file, I'm reluctant to do so.

Original Message:
Sent: Jan 05, 2026 07:18 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Thank you very much for your interest and quick response. Could you share the contents of the vmx file in txt format for reference? Perhaps there are issues with some of our definitions.

Original Message:
Sent: Dec 31, 2025 12:25 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Original Message:
Sent: Dec 29, 2025 12:29 PM
From: Serje Kon
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Thank you very much for your interest and quick response. Could you share the contents of the vmx file in txt format for reference? Perhaps there are issues with some of our definitions.

You bet. Launch vs 1 hour.

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Hi Gaurav,  Just a quick clarification, I am using a Mac Pro workstation, not a laptop.  I did run the leaks command and got a large printout of leaks reported after waiting for a few minutes for it to run.  Here's the start of the output, I'll post the bottom of the output in my next post.  Let me know if you want me to put the entire output into a file and send it directly to you somehow ...

Original Message:
Sent: Jan 07, 2026 04:15 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Original Message:
Sent: Jan 07, 2026 03:00 AM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Original Message:
Sent: Jan 07, 2026 01:57 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Hey Folks,

Thanks for the all the details shared here. We have got the information from Duncan Epping internally and we are looking into it. 

krayzee For your case as 

Thanks,

Gaurav

Original Message:
Sent: Jan 07, 2026 06:42 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hi Gaurav,  Just a quick clarification, I am using a Mac Pro workstation, not a laptop.  I did run the leaks command and got a large printout of leaks reported after waiting for a few minutes for it to run.  Here's the start of the output, I'll post the bottom of the output in my next post.  Let me know if you want me to put the entire output into a file and send it directly to you somehow ...

Original Message:
Sent: Jan 07, 2026 04:15 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Original Message:
Sent: Jan 07, 2026 03:00 AM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Original Message:
Sent: Jan 07, 2026 01:57 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Hey Folks,

Thanks for the all the details shared here. We have got the information from Duncan Epping internally and we are looking into it. 

krayzee For your case as 

Thanks,

Gaurav

Original Message:
Sent: Jan 07, 2026 06:42 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hi Gaurav,  Just a quick clarification, I am using a Mac Pro workstation, not a laptop.  I did run the leaks command and got a large printout of leaks reported after waiting for a few minutes for it to run.  Here's the start of the output, I'll post the bottom of the output in my next post.  Let me know if you want me to put the entire output into a file and send it directly to you somehow ...

Original Message:
Sent: Jan 07, 2026 04:15 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Original Message:
Sent: Jan 07, 2026 03:00 AM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Original Message:
Sent: Jan 07, 2026 01:57 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Here is the last little part of the leaks report output (the output is quite huge)

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Just want to mention an interesting observation.  In my guest windows virtual machine I run a program called blueiris, which displays video streams from several video security cameras and writes the video to an external NAS device 24/7.  When I terminate the program, the speed at which the vmware-vmx grows slows down to about 20% of that when it is running.  I don't know if that means anything but I thought I'd mention it.  I don't know if this is consistent behavior.

Here is the last little part of the leaks report output (the output is quite huge)

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Gaurav, Another set of data points. The attached zip file contains some traces from the vmmap command you suggested:

• vmmap_baseline.zip - a snapshot of memory footprint immediately after booting the Windows 11 ARM guest.
• vmmap_after_excel.txt - after I've edited an Excel spreadsheet. Note the memory usage has more than doubled.
• vmmap_after_more_stuff.txt - after performing some additional tasks (I think I opened Microsoft Edge and did some web browsing). Note that in the 25 or so minutes of usage, the memory footprint has added another 2 GB.
• vmmap_after_resume.txt - I suspended and resumed the guest. Note that memory footprint has decreased fro a high of 14GB to 8.1 GB. It still increases as I use the guest from that point. 

Something is seriously wrong here. Maybe a periodic suspend and resume can help mitigate the issue, but it doesn't seem right that a VM should continue to consume memory at the rate we're seeing. 

This behavior is a very big problem to users of Fusion on macOS Tahoe. It appears to be more widespread than I'd originally thought (it looks like it may be happening to others but they aren't noticing it). 

We really can't wait months for Broadcom to identify and fix this.  This isn't a cosmetic issue. 

Just want to mention an interesting observation.  In my guest windows virtual machine I run a program called blueiris, which displays video streams from several video security cameras and writes the video to an external NAS device 24/7.  When I terminate the program, the speed at which the vmware-vmx grows slows down to about 20% of that when it is running.  I don't know if that means anything but I thought I'd mention it.  I don't know if this is consistent behavior.

Here is the last little part of the leaks report output (the output is quite huge)

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Original Message:
Sent: Dec 29, 2025 12:29 PM
From: Serje Kon
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Gaurav, Another set of data points. The attached zip file contains some traces from the vmmap command you suggested:

• vmmap_baseline.zip - a snapshot of memory footprint immediately after booting the Windows 11 ARM guest.
• vmmap_after_excel.txt - after I've edited an Excel spreadsheet. Note the memory usage has more than doubled.
• vmmap_after_more_stuff.txt - after performing some additional tasks (I think I opened Microsoft Edge and did some web browsing). Note that in the 25 or so minutes of usage, the memory footprint has added another 2 GB.
• vmmap_after_resume.txt - I suspended and resumed the guest. Note that memory footprint has decreased fro a high of 14GB to 8.1 GB. It still increases as I use the guest from that point. 

Something is seriously wrong here. Maybe a periodic suspend and resume can help mitigate the issue, but it doesn't seem right that a VM should continue to consume memory at the rate we're seeing. 

This behavior is a very big problem to users of Fusion on macOS Tahoe. It appears to be more widespread than I'd originally thought (it looks like it may be happening to others but they aren't noticing it). 

We really can't wait months for Broadcom to identify and fix this.  This isn't a cosmetic issue. 

Just want to mention an interesting observation.  In my guest windows virtual machine I run a program called blueiris, which displays video streams from several video security cameras and writes the video to an external NAS device 24/7.  When I terminate the program, the speed at which the vmware-vmx grows slows down to about 20% of that when it is running.  I don't know if that means anything but I thought I'd mention it.  I don't know if this is consistent behavior.

Here is the last little part of the leaks report output (the output is quite huge)

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Original Message:
Sent: Dec 29, 2025 12:29 PM
From: Serje Kon
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Gaurav, Another set of data points. The attached zip file contains some traces from the vmmap command you suggested:

• vmmap_baseline.zip - a snapshot of memory footprint immediately after booting the Windows 11 ARM guest.
• vmmap_after_excel.txt - after I've edited an Excel spreadsheet. Note the memory usage has more than doubled.
• vmmap_after_more_stuff.txt - after performing some additional tasks (I think I opened Microsoft Edge and did some web browsing). Note that in the 25 or so minutes of usage, the memory footprint has added another 2 GB.
• vmmap_after_resume.txt - I suspended and resumed the guest. Note that memory footprint has decreased fro a high of 14GB to 8.1 GB. It still increases as I use the guest from that point. 

Something is seriously wrong here. Maybe a periodic suspend and resume can help mitigate the issue, but it doesn't seem right that a VM should continue to consume memory at the rate we're seeing. 

This behavior is a very big problem to users of Fusion on macOS Tahoe. It appears to be more widespread than I'd originally thought (it looks like it may be happening to others but they aren't noticing it). 

We really can't wait months for Broadcom to identify and fix this.  This isn't a cosmetic issue. 

------------------------------
- Paul (technogeezer)
vExpert 2025
------------------------------


Original Message:
Sent: Jan 08, 2026 09:01 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Just want to mention an interesting observation.  In my guest windows virtual machine I run a program called blueiris, which displays video streams from several video security cameras and writes the video to an external NAS device 24/7.  When I terminate the program, the speed at which the vmware-vmx grows slows down to about 20% of that when it is running.  I don't know if that means anything but I thought I'd mention it.  I don't know if this is consistent behavior.

Original Message:
Sent: Jan 07, 2026 06:45 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Here is the last little part of the leaks report output (the output is quite huge)

Original Message:
Sent: Jan 07, 2026 04:15 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Original Message:
Sent: Jan 07, 2026 03:00 AM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Original Message:
Sent: Jan 07, 2026 01:57 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Original Message:
Sent: Dec 29, 2025 12:29 PM
From: Serje Kon
Subject: VMWare Fusion 25H2 With M3 Memory Leak

It is being worked on Paul, I've been testing various builds, even today I downloaded a new build and been testing it and it looks promising. Reporting back to engineering/PM and then they can decide on the next steps. And indeed, pause/resume resets the memory usage it seem, but this isn't a fix.

Original Message:
Sent: Jan 12, 2026 03:20 PM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Gaurav, Another set of data points. The attached zip file contains some traces from the vmmap command you suggested:

• vmmap_baseline.zip - a snapshot of memory footprint immediately after booting the Windows 11 ARM guest.
• vmmap_after_excel.txt - after I've edited an Excel spreadsheet. Note the memory usage has more than doubled.
• vmmap_after_more_stuff.txt - after performing some additional tasks (I think I opened Microsoft Edge and did some web browsing). Note that in the 25 or so minutes of usage, the memory footprint has added another 2 GB.
• vmmap_after_resume.txt - I suspended and resumed the guest. Note that memory footprint has decreased fro a high of 14GB to 8.1 GB. It still increases as I use the guest from that point. 

Something is seriously wrong here. Maybe a periodic suspend and resume can help mitigate the issue, but it doesn't seem right that a VM should continue to consume memory at the rate we're seeing. 

This behavior is a very big problem to users of Fusion on macOS Tahoe. It appears to be more widespread than I'd originally thought (it looks like it may be happening to others but they aren't noticing it). 

We really can't wait months for Broadcom to identify and fix this.  This isn't a cosmetic issue. 

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Jan 08, 2026 09:01 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Just want to mention an interesting observation.  In my guest windows virtual machine I run a program called blueiris, which displays video streams from several video security cameras and writes the video to an external NAS device 24/7.  When I terminate the program, the speed at which the vmware-vmx grows slows down to about 20% of that when it is running.  I don't know if that means anything but I thought I'd mention it.  I don't know if this is consistent behavior.

Original Message:
Sent: Jan 07, 2026 06:45 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Here is the last little part of the leaks report output (the output is quite huge)

Original Message:
Sent: Jan 07, 2026 04:15 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Original Message:
Sent: Jan 07, 2026 03:00 AM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Original Message:
Sent: Jan 07, 2026 01:57 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

@Duncan Epping, Gaurav: Thanks, and it's good news to hear that it's being actively worked on. If there is anything that the community can do to help (e.g. provide more information), please let us know. 

Also glad to hear that a suspend/resume works for you as well to mitigate the issue. It's not a fix, but might help people get through the issue until a fix does appear. 

It is being worked on Paul, I've been testing various builds, even today I downloaded a new build and been testing it and it looks promising. Reporting back to engineering/PM and then they can decide on the next steps. And indeed, pause/resume resets the memory usage it seem, but this isn't a fix.

Original Message:
Sent: Jan 12, 2026 03:20 PM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Gaurav, Another set of data points. The attached zip file contains some traces from the vmmap command you suggested:

• vmmap_baseline.zip - a snapshot of memory footprint immediately after booting the Windows 11 ARM guest.
• vmmap_after_excel.txt - after I've edited an Excel spreadsheet. Note the memory usage has more than doubled.
• vmmap_after_more_stuff.txt - after performing some additional tasks (I think I opened Microsoft Edge and did some web browsing). Note that in the 25 or so minutes of usage, the memory footprint has added another 2 GB.
• vmmap_after_resume.txt - I suspended and resumed the guest. Note that memory footprint has decreased fro a high of 14GB to 8.1 GB. It still increases as I use the guest from that point. 

Something is seriously wrong here. Maybe a periodic suspend and resume can help mitigate the issue, but it doesn't seem right that a VM should continue to consume memory at the rate we're seeing. 

This behavior is a very big problem to users of Fusion on macOS Tahoe. It appears to be more widespread than I'd originally thought (it looks like it may be happening to others but they aren't noticing it). 

We really can't wait months for Broadcom to identify and fix this.  This isn't a cosmetic issue. 

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Jan 08, 2026 09:01 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Just want to mention an interesting observation.  In my guest windows virtual machine I run a program called blueiris, which displays video streams from several video security cameras and writes the video to an external NAS device 24/7.  When I terminate the program, the speed at which the vmware-vmx grows slows down to about 20% of that when it is running.  I don't know if that means anything but I thought I'd mention it.  I don't know if this is consistent behavior.

Original Message:
Sent: Jan 07, 2026 06:45 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Here is the last little part of the leaks report output (the output is quite huge)

Original Message:
Sent: Jan 07, 2026 04:15 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Original Message:
Sent: Jan 07, 2026 03:00 AM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Original Message:
Sent: Jan 07, 2026 01:57 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

Original Message:
Sent: Dec 29, 2025 12:29 PM
From: Serje Kon
Subject: VMWare Fusion 25H2 With M3 Memory Leak

I've been testing various builds Paul, seems a fix was just checked in, so I am going to test the latest build to see if that fixes the issue.

@Duncan Epping, Gaurav: Thanks, and it's good news to hear that it's being actively worked on. If there is anything that the community can do to help (e.g. provide more information), please let us know. 

Also glad to hear that a suspend/resume works for you as well to mitigate the issue. It's not a fix, but might help people get through the issue until a fix does appear. 

It is being worked on Paul, I've been testing various builds, even today I downloaded a new build and been testing it and it looks promising. Reporting back to engineering/PM and then they can decide on the next steps. And indeed, pause/resume resets the memory usage it seem, but this isn't a fix.

Original Message:
Sent: Jan 12, 2026 03:20 PM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Gaurav, Another set of data points. The attached zip file contains some traces from the vmmap command you suggested:

• vmmap_baseline.zip - a snapshot of memory footprint immediately after booting the Windows 11 ARM guest.
• vmmap_after_excel.txt - after I've edited an Excel spreadsheet. Note the memory usage has more than doubled.
• vmmap_after_more_stuff.txt - after performing some additional tasks (I think I opened Microsoft Edge and did some web browsing). Note that in the 25 or so minutes of usage, the memory footprint has added another 2 GB.
• vmmap_after_resume.txt - I suspended and resumed the guest. Note that memory footprint has decreased fro a high of 14GB to 8.1 GB. It still increases as I use the guest from that point. 

Something is seriously wrong here. Maybe a periodic suspend and resume can help mitigate the issue, but it doesn't seem right that a VM should continue to consume memory at the rate we're seeing. 

This behavior is a very big problem to users of Fusion on macOS Tahoe. It appears to be more widespread than I'd originally thought (it looks like it may be happening to others but they aren't noticing it). 

We really can't wait months for Broadcom to identify and fix this.  This isn't a cosmetic issue. 

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Jan 08, 2026 09:01 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Just want to mention an interesting observation.  In my guest windows virtual machine I run a program called blueiris, which displays video streams from several video security cameras and writes the video to an external NAS device 24/7.  When I terminate the program, the speed at which the vmware-vmx grows slows down to about 20% of that when it is running.  I don't know if that means anything but I thought I'd mention it.  I don't know if this is consistent behavior.

Original Message:
Sent: Jan 07, 2026 06:45 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Here is the last little part of the leaks report output (the output is quite huge)

Original Message:
Sent: Jan 07, 2026 04:15 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Original Message:
Sent: Jan 07, 2026 03:00 AM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Original Message:
Sent: Jan 07, 2026 01:57 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?

I've been testing various builds Paul, seems a fix was just checked in, so I am going to test the latest build to see if that fixes the issue.

@Duncan Epping, Gaurav: Thanks, and it's good news to hear that it's being actively worked on. If there is anything that the community can do to help (e.g. provide more information), please let us know. 

Also glad to hear that a suspend/resume works for you as well to mitigate the issue. It's not a fix, but might help people get through the issue until a fix does appear. 

It is being worked on Paul, I've been testing various builds, even today I downloaded a new build and been testing it and it looks promising. Reporting back to engineering/PM and then they can decide on the next steps. And indeed, pause/resume resets the memory usage it seem, but this isn't a fix.

Original Message:
Sent: Jan 12, 2026 03:20 PM
From: Technogeezer
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Gaurav, Another set of data points. The attached zip file contains some traces from the vmmap command you suggested:

• vmmap_baseline.zip - a snapshot of memory footprint immediately after booting the Windows 11 ARM guest.
• vmmap_after_excel.txt - after I've edited an Excel spreadsheet. Note the memory usage has more than doubled.
• vmmap_after_more_stuff.txt - after performing some additional tasks (I think I opened Microsoft Edge and did some web browsing). Note that in the 25 or so minutes of usage, the memory footprint has added another 2 GB.
• vmmap_after_resume.txt - I suspended and resumed the guest. Note that memory footprint has decreased fro a high of 14GB to 8.1 GB. It still increases as I use the guest from that point. 

Something is seriously wrong here. Maybe a periodic suspend and resume can help mitigate the issue, but it doesn't seem right that a VM should continue to consume memory at the rate we're seeing. 

This behavior is a very big problem to users of Fusion on macOS Tahoe. It appears to be more widespread than I'd originally thought (it looks like it may be happening to others but they aren't noticing it). 

We really can't wait months for Broadcom to identify and fix this.  This isn't a cosmetic issue. 

------------------------------
- Paul (technogeezer)
vExpert 2025


Original Message:
Sent: Jan 08, 2026 09:01 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Just want to mention an interesting observation.  In my guest windows virtual machine I run a program called blueiris, which displays video streams from several video security cameras and writes the video to an external NAS device 24/7.  When I terminate the program, the speed at which the vmware-vmx grows slows down to about 20% of that when it is running.  I don't know if that means anything but I thought I'd mention it.  I don't know if this is consistent behavior.

Original Message:
Sent: Jan 07, 2026 06:45 PM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Here is the last little part of the leaks report output (the output is quite huge)

Original Message:
Sent: Jan 07, 2026 04:15 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Apologies, I completely forget we don't allow attaching debugger on `vmware-vmx` as its VMware fusion official released build (not debug enabled).

Btw, for me it is printing output on console on the same build. It may look like its stuck, but it should print something from read-only memory of process on console after some time. 

Anyways we are trying to repro this issue internally by tweaking few things so that the release build can print leaks from writable (heap) memory of the target process on our side and I can't share such build in public. 

(I am also on Intel Mac book pro 2019, MacOs 26.2)

Original Message:
Sent: Jan 07, 2026 03:00 AM
From: krayzee
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hello Gaurav, here is my response to your request.  Please bear with me and ask for more specifics as I am not very savvy with this stuff.

I believe the information is as follows.  My Host OS is MacOS 26.2.  My Guest OS is Windows 11 Pro version 25H2, OS build 26200.7462 with a 64 bit operating system.  I am using a 2019 Mac Pro workstation (cheese grater) which is intel based.  The guest is configured for 20 GB installed RAM, 8 processor cores, and 3D acceleration is disabled.  I am running VMware fusion 25H2 (24995814).  

The process vmware-vmx grows continuously starting out around 20 GB, and the MacOS halts the process somewhere between 300-350 GB.  If I suspend the guest OS and resume, the vmware-vmx process drops back down to almost nothing.  If I reboot the guest OS, it does not change anything unless I also restart fusion.  It takes a few days for the process to hit 300 GB in size.

When I run the sudo command I get the following message 

Process 92558 is not debuggable. Due to security restrictions, leaks can only show or save contents of readonly memory of restricted processes.

Original Message:
Sent: Jan 07, 2026 01:57 AM
From: Gaurav Joshi
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Hey folks,

If you're seeing high memory usage by vmware-vmx and experiencing system hangs because of it,
could you please share your Host OS version and Guest Os version and Macbook version (Intel/M3/M4 pro etc)?

Also, please run the following command and share the output with us:

>sudo leaks <pid of the vmware-vmx process>

It would help us determine whether there are actual memory leaks or if something else is going on.

Thanks,

Gaurav

Original Message:
Sent: Dec 31, 2025 10:38 AM
From: Furkan Yucel
Subject: VMWare Fusion 25H2 With M3 Memory Leak

Can you investigate your vmware-vmx process? Vmware Fusion process fine about RAM but vmware-vmx spending a lot of memory(exceed seperated memory)

Original Message:
Sent: Dec 30, 2025 07:42 PM
From: Yoda Mann
Subject: VMWare Fusion 25H2 With M3 Memory Leak

1 Hour

Windows 11 Pro 25H2 26200.7462

VMWare Fusion Professional 25H2 (24995814)

MacBook Pro Apple M3 Max 26.2 (25C56) 128 GB RAM

I just don't seem to be seeing it. Am I missing something, what's the difference?