The last version of PAF for Mac was version 2.3.1 released in 1984, and will not run on Intel Macs. I used WineBottler to install PAF 5.2.18.0 for use on my Mac. You can also use VirtualBox providing you have a copy of Windows 95, 98, ME, 2000, or XP to install in VirtualBox 1st, then you can install PAF and and any other program that is compatible with those versions of Windows. OR you can simply download Ancestral Quest from Incline Software, Incline was the developer of PAF.