MINIMUM SYSTEM REQUIREMENTS:
Internet Connection: 3 Mbps wired or Wi-Fi connection
Operating System: Windows 7 or Vista (32 or 64-bit) or XP SP3 (32-bit), Mac OS X 10.5.8 or later
Computer: Most PCs and netbooks, all Intel-based Macs
Screen Resolution: 1024x576
RECOMMENDED SYSTEM REQUIREMENTS:
Internet Connection: 5 Mbps wired or Wi-Fi connection
Operating System: Windows® 7 or Vista (32 or 64-bit) or XP SP3 (32-bit)
Mac® OS X 10.6 or later
Computer: Dual-core PCs, all Intel-based Macs
Screen Resolution: 1280x720
I copied this from the FAQ