Lets put it this way, you have an outdated game console and a whole set of games in your shelves. No worries, it is not illegal if you own the console and games. While one may fear treading onto the line line of piracy. Computers are getting more and more advanced with powerful hardware, so it is possible to turn your Mac computer into a Playstation 2 console.
This guide shows you how to install the Playstation 2 emulator for Mac OS X.