In order for you to play CRYPTARK on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Lion 10.7.5, Yosemite strongly recommended
Processor (CPU):
Dual Core 2.5 GHz
Memory (RAM):
3 GB RAM
Graphics Card:
Geforce 9600 GS, Radeon HD4000, Shader Model 3.0, 512 MB