In order for you to play Skulls of the Shogun on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Mavericks 10.9.5, 64-bit
Processor (CPU):
Dual Core CPU
Memory (RAM):
1 GB RAM
Graphics Card:
OpenGL 3.0+ support (2.1 with ARB extensions acceptable)
Hard Drive:
1 GB HD space