Mac OS X "Panther" 10.3.9 or later, Intel or PowerPC based 1 GB RAM (2 GB recommended) 1.6Ghz CPU (2.4 Ghz recommended, Dual Core strongly recommended for Host) Hard disk space: 300MB Graphics card must support 1024x1024 textures (most 32MB and up graphics cards do), 1024x768 or greater (32 bit color recommended) Wheel mouse is recommended but not required. Broadband Internet Connection or LAN required for multiplayer.