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  • 1.  "Guessing of generated iso file failed" error while downloading Windows 11 on Macbook Pro 2023 (M3)

    Posted Nov 02, 2024 10:40 AM
    I'm trying to download Windows 11 on VMWare Fusion on my Macbook Pro. It's the November 2023 model and it has the M3 chip.
    What is causing this error? I've followed all the basic instructions for downloading Windows 11 via VMWare Fusion but I keep getting this error. I can provide additional information as needed. 
    Error halts the Windows 11 download process-


  • 2.  RE: "Guessing of generated iso file failed" error while downloading Windows 11 on Macbook Pro 2023 (M3)

    Posted Nov 02, 2024 12:03 PM

    This is an error that I haven't come across before. What version of Fusion are you using?

    Can you try running the command again, and if it fails collect a quick support bundle, than post that in a reply to this thread? 



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    - Paul (technogeezer)
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  • 3.  RE: "Guessing of generated iso file failed" error while downloading Windows 11 on Macbook Pro 2023 (M3)

    Posted Nov 02, 2024 04:42 PM

    Another thing to try:

    Open a terminal.

    Use the following command to get the URL of the downloadable ESD file from Microsoft

    /Applications/VMware\ Fusion.app/Contents/Library/vmw_esd2iso getesdurl --edition edition --lang language

    Example:

    % /Applications/VMware\ Fusion.app/Contents/Library/vmw_esd2iso getesdurl --edition "Professional" --lang "en-us"

    ESDURL : http://dl.delivery.mp.microsoft.com/filestreamingservice/files/a0a4e466-0094-4903-9d46-6421eb4b1e83/26100.2033.241004-2336.ge_release_svc_refresh_CLIENTCONSUMER_RET_A64FRE_en-us.esd

    SHA1 : 6e37f71fecf4a74e5c37cd49316c874f061a2fb6

    SUCCESS

    The URL can be found as "ESDURL" in the output of that command.

    Then, manually download the  ESD from Microsoft using the following command:

    curl -l esd-url > win11.esd

    Example using the ESDURL from the above example:

    % curl -l http://dl.delivery.mp.microsoft.com/filestreamingservice/files/a0a4e466-0094-4903-9d46-6421eb4b1e83/26100.2033.241004-2336.ge_release_svc_refresh_CLIENTCONSUMER_RET_A64FRE_en-us.esd >win11.esd

    If this command fails to complete the download of the ESD file, the problem is not Fusion. It's more than likely a problem with Microsoft's download servers or some other network related issue.



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    - Paul (technogeezer)
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  • 4.  RE: "Guessing of generated iso file failed" error while downloading Windows 11 on Macbook Pro 2023 (M3)

    Posted Nov 03, 2024 01:14 AM

    Hey Paul-

    I'm using Fusion Version 13.5.2. I didn't run any commands to download Windows 11, I simply followed the prompt in the Installation Method to "Get Windows from Microsoft". I don't know how to collect a support bundle but if you could guide me through it I can obtain that.

    I tried running the command in your second response, and it appears that the job could not be finished. It is returning that "transfer closed with 309615 bytes remaining to read." Please see the screenshot of Terminal below:


    If you could please confirm if this is a failed job and that this is an issue on Microsoft's side, that would be greatly appreciated. 

    Thanks so much for your help thus far. 




  • 5.  RE: "Guessing of generated iso file failed" error while downloading Windows 11 on Macbook Pro 2023 (M3)

    Posted Nov 03, 2024 09:32 AM
    Edited by Technogeezer Nov 03, 2024 09:49 AM

    No need to collect the support bundle, the commands are telling us what the logs would. 

    The Microsoft servers are saying that the transfer should contain a certain file size, but are closing the connection before tha amount of data they said would be transferred actually was. That to me says an issue on Microsoft's side. The only recourse in my opinion is to keep trying because nobody here (including VMware) has access to Microsoft's servers to debug this. 



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    - Paul (technogeezer)
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  • 6.  RE: "Guessing of generated iso file failed" error while downloading Windows 11 on Macbook Pro 2023 (M3)

    Posted Nov 03, 2024 01:08 PM

    Thanks Technogeezer. Ur rad