In order for you to play ChromaGun on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X 10.8
Processor (CPU):
2.0 GHz Dual Core
Memory (RAM):
2 GB RAM
Graphics Card:
NVIDIA GT 460 or AMD Radeon HD 5550 w/ 1024 MB
Storage:
1 GB available space
In order to play ChromaGun on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
OS X 10.9
Processor (CPU):
2.4 GHz Intel i5
Memory (RAM):
4 GB RAM
Graphics Card:
NVIDIA GTX 660 Ti, or AMD Radeon HD 7870 w/ 1024 MB
Storage:
1 GB available space