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For the longest time I’ve tried getting bootcamp to work, I’ve reset my mac many times, reinstalled MacOS many times, I’ve downgraded to catalina, big sur, monterey, yet nothing works. I have a iMac 2017 21.5” Fusion Drive, I’ve tried to troubleshoot with every online resource that’s available on Google. I’m really desperate.
iMac 21.5″ 4K, macOS 13.4
Take a look at this Microsoft link - https://learn.microsoft.com/en-us/windows-hardware/customize/desktop/unattend/microsoft-windows-setup-imageinstall - and check if the structure looks similar.
If you have values which are different, also look at Windows 10 install error, cannot find dis… - Apple Community.
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *28.0 GB disk0
1: EFI EFI 314.6 MB disk0s1
2: Apple_APFS Container disk2 27.7 GB disk0s2
/dev/disk1 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_APFS Container disk2 1000.0 GB disk1s2
/dev/disk2 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme - +1.0 TB disk2
Physical Stores disk1s2, disk0s2
1: APFS Volume Macintosh HD - Data 18.9 GB disk2s1
2: APFS Volume Preboot 1.9 GB disk2s2
3: APFS Volume Recovery 1.1 GB disk2s3
4: APFS Volume VM 4.3 GB disk2s4
5: APFS Volume Macintosh HD 9.1 GB disk2s5
6: APFS Snapshot com.apple.os.update-... 9.1 GB disk2s5s1
As far as I can tell, my Fusion Drive is intact, I reset my Fusion Drive before and it still did not work.
After you see the error message, before you restart, if you use Shift+F10 (or Shift+Fn+F10), do you see a Windows CMD window? If yes, you will need to find AutoUnattend.xml and make a copy of it to an external USB, before you restart.
At CMD prompt, if you to change directory to the Boot disk (it may be D: or E: or X:), and run
dir/s/p AutoUnattend.xml
Do you see this file?
Sorry for the late response, I managed to find the Boot drive and I was able to find the AutoUnattend.xml file, I have successfully copied it to an external drive. I’ve uploaded it to pastebin for convenience:
[Link Edited by Moderator]
From what I see everything seems to be intact, and nothing seems to be out of the ordinary. I believe the issue might be due to Windows detecting an abnormal drive as a fusion drive is created using software? I’ve tried creating a bootable USB, I attempted to select BA’s own bootcamp drive but it wasnt able to use it, trying to delete the partition and having Windows create a supported partition didn’t work either and it left me with unclaimed space that I had to reclaim by resetting my fusion drive.
On a Fusion Drive, BC Assistant will use the physical hard disk (instead of the SSD) to install Windows.
Also, start a macOS Terminal window before you run BC Assistant. Before the Windows installer restarts your Mac, check to see if your 1TB drive has a Bootcamp partition.
BC Assistant will normally mark the OSXRESERVED partition for deletion.
As a test, we can also try to manually partition the Fusion drive to see if it there is an issue on the macOS side. This uses the following syntax
diskutil APFS resizeContainer <inputDisk> <newSize> [<triple>*]
The "[<triple>*]" is used to create the Bootcamp partition.
Again, sorry for the late response. I do know for a fact that there is a BOOTCAMP partition, as when I hold down option I can see BOOTCAMP as a bootable device. I am rather confused on diskutil apfs resizeContainer’s usage, I am unsure what to put in <triple>, if anything.
If anyone’s still encounting this error, I was able to solve this issue by resetting my mac’s SMC. Should be a suggestion that the SMC be reset after resetting the fusion drive.
The error is related to The AutoUnattend.xml file that BC Assistant generates. Is your Fusion Drive intact and correctly configured?
From macOS Terminal, try to post the output of
diskutil list
This looks fine. If your Windows installation fails, is there an OSXRESERVED partition left behind on the internal disk?
I’ve checked and there is a OSXRESERVED partition during the windows setup process but as soon as I restart (after the error) the partition goes missing.
ImageInstall error