Mac Requirements

Minimum Requirements
OS
Mac OS X 10.10.3
Processor
Intel 2.4 GHz
RAM
8GB
Hard Disk
80GB
Graphics
1GB
Input
Multi-button Mouse
Recommended Requirements
OS
Mac OS X 10.10.3 or higher
Processor
Intel 3.2 GHz
RAM
16GB
Hard Disk
80GB
Graphics
4GB
Input
Gamepad

The following graphics cards are not supported: AMD Radeon HD 5xxx Series, AMD Radeon HD 6xxx Series, Intel HD5300, Intel Iris 6100, Intel HD4000, Intel Iris 5100, Intel HD6000 and Intel HD5000.

This game is not currently supported on volumes formatted as Case-sensitive.

Links

Linux Requirements

Minimum Requirements
OS
Ubuntu 14.04.2 (64bit)
Processor
Intel 2.6 GHz
RAM
4GB
Hard Disk
47GB
Graphics
1GB Nvidia GTX 640 DDR3 series or better
Input
Keyboard & Mouse
Recommended Requirements
OS
Ubuntu 14.04.2 (64bit)
Processor
Intel 3.4 GHz
RAM
8GB
Hard Disk
47GB
Graphics
4GB Nvidia GTX 9xx series or better
Input
Gamepad

AMD and Intel GPUs are not supported at this time. Requires 64-bit OS to play.