A/UX 3 emulates Mac OS 7.01 limiting what mac software you can run, and most video control panels do not work (slow video).

If you want to run A/UX you most likely want to run a server, use the A/UX version of Retrospect, and want to run old OS 6/7.0 era apps.

There are apps written that will work under A/UX mac OS emulation, not sure how many A/UX native ones were made.