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Windows 10 ISO Not Recognized by bootcamp

CPark98

CPark98

macrumors 6502
Original poster
Apr 5, 2016
430
1,998
Hello, anyone experience this before? I'm trying to install windows onto bootcamp but every time I download an iso and open it I get this error. Outside of bootcamp, when I try to open the ISO file It says "No Mountable File Systems."
Screen Shot 2020-09-04 at 11.17.24 AM.png
 
I guess it boils down to avoiding betas, since its to be expected to have bugs. I long gave up on installing a macOS (or windows) beta as one of the earlier macos betas messed up my system so much that I had to reformat and start over
 
I have the same, on Public Beta 6. On the previous Public Beta, Boot Camp would accept the (same) iso, but crash soon after.

Update: found this article online.

Interestingly, when trying to mount the Windows 10 iso file, it says there's no mountable image. Similarly, when trying to boot as root (sudo hdiutil mount), it fails the first time. However, upon trying again, it does succeed. I mounted the WindowsHelper and the Windows 10 images this way. Then, Boot Camp accepts the iso file.

However, it then failed partitioning my disk and instructed me to run First Aid. I did, and it found and corrected some random errors. However, it still can't partition my disk.

Little luck.
 
Last edited:
maflynn said:
I guess it boils down to avoiding betas, since its to be expected to have bugs. I long gave up on installing a macOS (or windows) beta as one of the earlier macos betas messed up my system so much that I had to reformat and start over
Click to expand...

not only do I avoid betas, I won't install the macOS release until a month or two before the NEXT release. I upgraded to Catalina last month. Runs beautifully thanks to all the consumer beta testing over the past year. I look forward to trying Big Sur next August. :D
 
Last edited:
The problem is Big Sur Beta 6. It has broken some things to do with file systems.
  • It can't open ISO files that were not created on a Mac using Mac software like Disk Utility.
  • It has a problem with SMB unless you run a magic incantation
    (sudo kextload /System/Library/Extensions/smbfs.kext) at startup.
  • After booting up you need to let it settle for a minute or so while it gets it petticoats in order otherwise it freezes on you.
  • It won't run balenaEtcher USB burner software.
 
Gautam. said:
I have the same, on Public Beta 6. On the previous Public Beta, Boot Camp would accept the (same) iso, but crash soon after.

Update: found this article online.

Interestingly, when trying to mount the Windows 10 iso file, it says there's no mountable image. Similarly, when trying to boot as root (sudo hdiutil mount), it fails the first time. However, upon trying again, it does succeed. I mounted the WindowsHelper and the Windows 10 images this way. Then, Boot Camp accepts the iso file.

However, it then failed partitioning my disk and instructed me to run First Aid. I did, and it found and corrected some random errors. However, it still can't partition my disk.

Little luck.
Click to expand...
Thank you for sharing.I have failed at least 3 times,but i will try again.
 
Hey guys. Here's what worked for me:

-I first downloaded the ISO, then extracted it to a folder using Keka;
-Then, using Disk Utility, I created a .cdr file (Disk Utility>File>New Image>Image from Folder, then on Image Format select DVD/CD Master);
-Which I then converted to an .iso using Terminal:
Code: 
cd ~/Desktop
hdiutil makehybrid -iso -joliet -o -FILENAME.iso FILENAME.cdr
(Desktop being where my file is.) Also be sure to change FILENAME to the name of your file, obviously.

Use the ISO file you just created and it should work :)

edit: nvm it crashed at the end
 
Last edited:
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