I adopted an ideal hyperlink on how you can make bootcamp on an exterior disk right here https://apple.stackexchange.com/a/384447/588919
however I confronted with a number of points:
- I attempted to put in Win 10 professional and Win 11 Professional on my exterior NVME disk
- Win 11 appears to have a extra good installer – it might probably begin putting in through GUI however at all times will get an error on 82% (do not know what’s going on at that stage)
- if I apply photographs through DISM as described within the Hyperlink it finishes okay, however iMac cannot boot as a result of BSOD – inaccessible boot gadget, it doesn’t matter what Home windows variations on W10 and W11 the difficulty is identical
- I checked that TbtBusDrv.sys driver is added to the bootcamp disk and I modified HKLM/SYSTEM/ControlSet001/Providers/nhi registry DWORD32 Begin to 0x0000000 worth (default was 0x00000003 ) to start out it through the boot course of but it surely doesn’t assist me
Do you’ve gotten any Concepts on how you can repair BSOD?

