(Apple's UniX) Apple's first version of Unix for Macintosh computers. A/UX merges the Macintosh Finder (GUI) with a Unix core, offering functions from both systems. It will run on some late-model Motorola 68000 Macs, but not on the Power Mac. A/UX is based on AT&T Unix System V.2.2 with numerous extensions from V.3, V.4 and BSD 4.2/4.3. It also provides full POSIX compliance. A/UX 3.x.x incorporates System 7 for the Macintosh, thus supporting the vast majority of Macintosh applications. System 7 and Unix are fully integrated under A/UX 3.x.x with the Unix file system being seen as a disk drive by the Finder.