In order for you to play The Walking Dead on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Snow Leopard (10.6.X)
Processor (CPU):
2.3 GHz Intel
Memory (RAM):
4 GB RAM
Hard Disk Space:
2 GB
Video Card:
ATI or nVidia card with 512 MB RAM (not supported on Intel integrated graphics)
Additional:
Not supported on Intel integrated graphics, Mac Minis or early-generation MacBooks
In order to play The Walking Dead on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Snow Leopard (10.6.X)
Processor (CPU):
Core 2 Duo 2GHz
Memory (RAM):
4 GB RAM
Hard Disk Space:
2 GB Space Free
Video Card:
ATI or nVidia card with 1024 MB RAM
Additional:
Not supported on Intel integrated graphics, Mac Minis or early-generation MacBooks