[Top Jimmy]

Originally Posted by Sardi

...every time I boot into Mojave, the main OS I run, I get an error saying the disk is unsupported or something along those lines.

Incompatible disk warning. I found that the disk utility doesn't default to showing both the physical drive and partition. It only shows partition/container when opened, but you can go to view and set it to show all devices. I had to reformat at the drive level instead of the container to fix that problem.