Hi everyone - as a lockdown project, I took a 5k iMac from 2015, opened it up, and replaced the fusion drive with an NVME SSD to run Big Sur on, and a Sata SSD to run Boot Camp on.
Unfortunately, I didn’t realise until after I closed the machine back up that Boot Camp Assistant doesn’t work if you have two internal drives.
I’m now working on a workaround and thought I’d start by creating an image of the Boot Camp volume on my Macbook Pro, to then copy across onto the Sata SSD.
All went well until I restarted my computer and tried to log into the Boot Camp drive. Instead of one Boot Camp drive, it detected two, and when I tried to select either one, the computer screen went black, spun up for fans for a while, then turned off.
I suspect this is a driver issue. Does anyone have any suggestions on what to do?