I remember that there was a MacMiNT decades ago (what Mac users didnt have to go through to get a nix userland
) i suppose it must have done something like that already to be be hosted on MacOS7. (not that the code would be relevant, probably bit rotten or lost).
I guess the real challenge after that is getting fVDI to work so you can run a multitasking AES.
I took a quick look through the code tree and as fVDI can work with just plain chunky framebuffers whats probably the easiest hardware to get fVDI up on would be a RTG board. (which WinUAE emulates ofcourse