In order for you to play Crypt of the NecroDancer on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Minimum 10.6 to run the game, 10.7 if you also want to use your own music files
Processor (CPU):
2GHz
Memory (RAM):
1000 MB RAM
Graphics Card:
512MB VRAM
Storage:
1600 MB available space