@yall hello there. While the problems can be many running on virtual machines as a concept, macOS is at least with the proper drivers on VMware pretty decent.
You probably have either an error or incompatibility between HISE and JUCE, or a HISE setting not correctly entered. Is the hise path correctly entered when you built HISE?
JUCE issues may be the thing here, where JUCE 5 does not support XCode 12. I have not tried Xcode past version 8.3.3.
Did the Apple engineer specify that you needed to use Big Sur at all? Or could you install the XCode Silicone additions or libraries on earlier versions? If so, the issues may only be the actual clang or c++ compiler flags and the necessary libs, not the actual OS, or even XCode. Ask him about that, and please get back to me, I want to support the Silicone M1 chips too.