OS: OS X version Leopard 10.5.8, Snow Leopard 10.6.3, or later. Processor: Intel 1.8 GHz or higher Memory: 1.5 GB RAM Graphics: ATI Radeon x1900 or better / NVIDIA 8600M or better with 128 MB or higher Video Memory (VRAM) Hard Drive: 2 GB free disk space NOTES: For the best results, make sure you have the latest drivers for your video and audio cards.