A/UX 1.x will probably only support a 68000 or maybe 68020 like an SE or Mac II, A/UX 2.1 was the first to support a 68030 IIfx.

Click to expand...

I guessed this too, but if this chart is accurate, the various versions of A/UX overlap the same handful of machines.

http://www.aux-penelope.com/hardware.htm

It seems that there is no Mac which can run A/UX 1 or 2 which cannot run 3 instead. I was hoping v1 might run on my SE. Oh well!