Created by Linux, PCSX is an emulator for the first PlayStation games that allows you to use CDs from the legendary Sony console on your Mac OS X. However, you can not use CD images on PCSX so you'll have to burn them to disc first. Games like Crash Bandicoot, Metal Gear Solid, Final Fantasy 7, Tekken 3, Gran Turismo and MediEvil are just some of the titles compatible with PCSX. To play them, you must first install a BIOS for PlayStation. Then, when you have it installed, drag and drop it onto the program's interface. PCSX allows you to save and retrieve items (Freeze State and Defrost State), reconfigure the keyboard (in preferences) and load saved games in the CVGS format.
Free download of toMOTko for Mac OS X 0.11.2.. Application also works on other systems: Windows, Linux, MacOS, and theoritically, on Windows Mobile 6.x. The latter has been tested successfully in the emulator but as I do not have a device running this system, I don't know for sure if.