What is A/UX?

Primarily based on System V, revision 2, A/UX is a Unix implementation developed by Apple Computer. It runs only on older Macintoshes, specifically certain models with 68030 and 68040 (FPU required) processors. It is not compatible with PowerPC-equipped computers, nor does it run on 68k computers in the LC, Performa, Duo, and PowerBook lines. It is a true Unix, but uses the Mac OS 7 Finder and supports most 68k Mac OS applications. It comes with a standard set of Unix utilities, including an implementation of the X Window System. Some GNU applications have also been ported to A/UX.

Apple has discontinued development for A/UX.

Also see:

• What versions of Unix can I run on my Macintosh-compatible computer?