Take GTA III for example. On PC, you must have this as a minimum: Intel Pentium III 450MHz 96MB RAM 500MB Hard Disk Space 16MB Video Memory On Mac, you need as a minimum: Intel Core 2 Duo (Will not run on PowerPC - WTF) 1GB RAM 9GB Hard Disk Space ATI X1600, NVIDIA 7300 GT or Intel X3100 integrated graphics (256MB) GTA III's Mac minimum system requirements are similar to GTA IV's PC system requirements. I know that this is quite a large gap, but all other games that I've seen that are both on PC and Mac seem to differ in minimum system requirements, where Mac games require better hardware than PC games. I don't get it? Is it so that it costs you more to play it on a Mac or is it because Mac isn't really a big gaming platform? The way I've seen it is even if your computer (Mac or PC) just meets the requirements the game still performs like garbage, with some exceptions. That's why there's recommended system requirements but even still, on my friend's 2011 iMac (before it died) GTA San Andreas, Minecraft and The Sims 3 all had substandard performance despite her nice hardware and I couldn't do anything to fix it. But Minecraft did perform the best out of all the games I bought for her iMac.