Minimum
OSX Snow Leopard 10.6.3, 2 GHz Dual core, 3 GB RAM, nVIDIA GeForce 8800, 512 MB RAM or ATI Radeon HD 3850, 512 MB RAM, 2 GB HD space, Broadband Internet connection
Recommended
OSX Snow Leopard 10.6.3 or later, 3 GHz Quad core, 4 GB RAM, nVIDIA GeForce GTX460, 1 GB RAM or AMD Radeon HD 6850, 1 GB RAM, 2 GB HD space, Broadband Internet connection
Minimum
Microsoft Windows XP/Vista/7/8, 2 GHz Dual core, 3 GB RAM, nVIDIA GeForce 8800, 512 MB RAM or ATI Radeon HD 3850, 512 MB RAM, DirectX®: 9.0, 2 GB HD space, Broadband Internet connection
Recommended
Microsoft Windows 7/8, 3 GHz Quad core, 4 GB RAM, nVIDIA GeForce GTX460, 1 GB RAM or AMD Radeon HD 6850, 1 GB RAM, DirectX®: 9.0, 2 GB HD space, Broadband Internet connection