In order for you to play Kingdom: Classic on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X Snow Leopard (version 10.6)
Processor (CPU):
Dual Core Intel
Memory (RAM):
2 GB RAM
Graphics Card:
Nvidia 320m (or equivalent)
Storage:
512 MB available space
In order to play Kingdom: Classic on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
macOS 10.14 Mojave (Not Compatible on macOS 10.15 or higher)
Processor (CPU):
Quad Core Intel
Memory (RAM):
4 GB RAM
Graphics Card:
Discrete GPU
Storage:
512 MB available space