A/UX was that OS. Unless you are talking about running Mac programs as separate processes directly on Unix, protected from one another. They certainly could h

A/UX was that OS. Unless you are talking about running Mac programs as separate processes directly on Unix, protected from one another. They certainly could have worked, but would have been as different from regular Mac programs as what they did end up with. Ultimately, they had to "fail" a bunch of times before they admitted that what worked was what should ship, and shipped one of them.