Not sure... Probably would have dragged MacOS classic into the 21st century, and I would have little to do with them...
If my memory serves, TripOS (the basis for AmigaDOS) was a Unix inspired system if not a direct clone... So no UNIX, no Amiga :-/
TRIPOS was originally developed for the PDP-11, but that's about the only thing it has in common with UNIX.