In order for you to play Sid Meier's Starships on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Mac OS X 10.9 or higher
Processor (CPU):
2.0 GHz Intel
Memory (RAM):
2 GB RAM
Graphics Card:
256 MB nVidia 8800 GT or better, or Intel HD4000 or better integrated graphics
Storage:
700 MB available space