EMUlaunch is simply a means to display file listings and artwork for your roms and emulators. It facilitates the opening of your games from one simple interface. It does not contain the actual roms or emulators. It is an application launcher. For more information as to where to download emulators on the Mac I suggest visiting EMUSCENE.COM. Please respect the hard work by those who have created these games, you should own the games for any roms on your computer.