In order for you to play Insurgency on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
MacOS X 10.6.6 or higher
Processor (CPU):
Intel® Core i3 Processor (2GHz or better)
Memory (RAM):
4 GB RAM
Graphics Card:
ATI Radeon HD 2400 or better / NVIDIA 8600M or better
Hard Drive:
10 GB HD space
In order to play Insurgency on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Processor (CPU):
Intel® Core i5 Processor (3GHz or better)
Memory (RAM):
8 GB RAM
Graphics Card:
Video card 2048 MB or more
Hard Drive:
10 GB HD space on a SSD