Video Card: 256MB NVIDIA GeForce 8600 / ATI Radeon HD 2600
Sound: DirectX Compatible
OS: Mac OS X Snow Leopard 10.6.8 or higher
Processor: Intel Core 2 Duo processor
Memory: 2 GB RAM
Hard Disk Space: 10 GB free
Video Memory: 256MB
Video Card: AMD HD2600 / Nvidia 9600GT with at least 256 MB VRAM
Additional: Initial installation requires one-time internet connection for Steam authentication; software installations required (included with the game) include Steam Client for Mac OS X.