Running with side channel mitigations turned on slows performance of the VM slightly but is more secure. The VM's Settings > Advanced is where you can toggle the mitigations on or off.
It's up to you to decide if turning it on results in any kind of noticeable performance degradation for what you use the VM for.
Original Message:
Sent: Jul 21, 2025 04:36 PM
From: JulesT
Subject: Problem upgrading VM to Win 11
Thank you! This worked, and I'm now showing Professional running.
I've also got a new VM up and running. Just need to install the software I use and copy some files over.
When my VM starts up, it gives me a message about Side Channel Mitigations. I'm not sure what that is. My old VM had it disabled. Is it ok to disable it in this Win11 VM too?
Original Message:
Sent: Jul 21, 2025 01:45 PM
From: Technogeezer
Subject: Problem upgrading VM to Win 11
If you go to the Fusion menu bar and click VMware Fusion > About VMware Fusion..., does it indicate that you're running Fusion Player 13.6.4? If so, you likely have a Fusion Player license key from an older Fusion 13 version that's being recognized.
First power off all virtual machines and shut down the VMware Fusion GUI. Then check to see if there's an old license file by opening the Terminal and issuing the following:
sudo ls -al /Library/Preferences/VMware\ Fusion/license-fusion-13*
If any files starting with license-fusion exist, remove them using the following command:
sudo rm /Library/Preferences/VMware\ Fusion/license-fusion-13*
Now restart Fusion and re-check "About VMware Fusion...". It should now say VMware Fusion Professional.
------------------------------
- Paul (technogeezer)
vExpert 2025
Original Message:
Sent: Jul 21, 2025 12:34 PM
From: JulesT
Subject: Problem upgrading VM to Win 11
I did download Fusion Pro 13.6.4 and tried to install it, thinking I could maybe just build a new VM with Pro and try to install Win11. However, when I ran the installer, it just opens my current VM, which is the Player version (with Win10).
Original Message:
Sent: Jul 21, 2025 10:17 AM
From: JulesT
Subject: Problem upgrading VM to Win 11
I run a Windows VM on Fusion Player Version 13.6.3 (24585314). I only use Windows for basically one software program that doesn't operate on a Mac. It's the main program for my work, so I don't want to mess it up.
I haven't yet upgraded my VM to Windows 11. When I check my Fusion VM compatibility in PC Health at a glance, it says:
This PC doesn't currently meet Windows 11 system requirements.
The two issues are:
This PC must support Secure Boot
TPM 2.0 must be supported and enabled on this PC.
I'm nervous about editing the BIOS to change these items. I've looked at the two sites about how to enable TPM 2.0 and Secure Boot.
Is this something I should just dive into and do? I'm not sure if these instructions will pertain to my virtual machine or are for an actual PC...or if there's any difference.
Should I download Fusion Pro first and see if it is compatible? If so, how do I move the contents (files and programs) of my VM from my Player version to the Pro version?
I used to have a support contract and would just call VMWare for help. I hope someone here will be able to guide me on what to do. Thanks in advance!!
Julie