After an exhaustive look at what's on offer, I've decided that QMC2 is one of the best front ends available (it works for a starter, which is more than can be said for many others I tried). MAME is software without an interface, so in order to use MAME comfortably in a way that doesn't require you type lines of code into Terminal you'll need to get a front-end. The software we'll be primarily focusing on here is MAME (Multiple Arcade Machine Emulator), but the technique works for MESS (Multiple Emulator Super System) and UME (Universal Machine Emulator) too. This shouldn't come as a surprise to you, but your Mac needs a few extra bits of software in order to play classic arcade games. You can even bring your gamepad or joystick along for the ride too! It's not necessarily an easy process, in fact it's rather fiddly to tell the truth, but with the right software and some patience you can enjoy the classics on OS X. Mac OS X isn't the hotbed of gaming and emulator action many of us wish it was, but the hardware inside your iMac or MacBook is more than capable of running classic coin-op games.