The later versions of A/UX require a 68030 or 68040 based Macintosh with an FPU and PMMU, and it will not run on AV models or LC models. Version 3.1.1 of A/UX was specifically designed to run on the Quadra 900 series, and version 3.0.1 is recommended for any other Mac model. The following Macintosh models should work with A/UX: