The Walking Dead System Requirements

Minimum:

OS: XP Service Pack 3 / Vista / Windows 7
Processor: 2.0 GHz Pentium 4 or equivalent
Memory: 3 GB RAM
Hard Disk Space: 2 GB Space Free
Video Card: ATI or NVidia card w/ 512 MB RAM (Not recommended for Intel integrated graphics)
DirectX®: Direct X 9.0c
Sound: Direct X 9.0c sound device

Recommended:

OS: XP Service Pack 3 / Vista / Windows 7
Processor: Core 2 Duo 2GHz or equivalent
Memory: 3 GB RAM
Hard Disk Space: 2 GB Space Free
Video Card: ATI or NVidia card w/ 1024 MB RAM (Not recommended for Intel integrated graphics)
DirectX®: Direct X 9.0c
Sound: Direct X 9.0c sound device

The game is also playable on Mac. The Mac system requirements are as follow:

Minimum:

OS: Snow Leopard (10.6.X)
Processor: 2.3 Ghz Intel
Memory: 4 GB RAM
Hard Disk Space: 2 GB Space Free
Video Card: 512 MB NVidia or ATI graphics card
Additional: Not recommended for Intel integrated graphics or Mac Minis or early-generation MacBooks

Recommended:

OS: Snow Leopard (10.6.X)
Processor: Core 2 Duo 2GHz
Memory: 4 GB RAM
Hard Disk Space: 2 GB Space Free
Video Card: 1024 MB NVidia or ATI graphics card
Additional: Not recommended for Intel integrated graphics or Mac Minis or early-generation MacBooks