Once my macbook upgraded to Big Sur (I was trying to keep it Mojave, but had to upgrade for work
[You must be logged in to view images. Log in or Register.] ), I have to use Parallels to run P99. It works fine now, but is a little janky on launch, I have to swap between windows and fullscreen mode to fix the resolution, otherwise it's very pixelated. But! It is possible to run P99 on a Big Sur macbook.