Starting with MacOS 11.3, Altium Designer crashes the Windows 10 Fusion VM hard any time it tries to display a PCB document in 2D mode. Interestingly, 3D PCB views work well, as does schematic editing and the other features of AD in general. This appears to be some combination of something silly the Altium people are doing to the virtual GPU and a latent bug in Fusion. AD has been running under a Fusion VM quite well for about a decade until now. So this is very disappointing.