In order for you to play Dark Matter on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X 10.5 or later
Processor (CPU):
Intel Core Duo Processor (2.4 GHz or better)
Memory (RAM):
2 GB RAM
Graphics Card:
Shader Model 3.0 compatible videocard, 256 MB nVidia or ATI graphics card
Storage:
1 GB available space
In order to play Dark Matter on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
OS X 10.5 or later
Processor (CPU):
Intel Core I5 or higher
Memory (RAM):
4 GB RAM
Graphics Card:
nVidia Geforce 460 series or better, Radeon HD5450 or better; 512 MB or higher
Storage:
1 GB available space