In order for you to play BIT.TRIP RUNNER on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X version Snow Leopard 10.6.3, or later.
Processor (CPU):
2.0+ GHz
Memory (RAM):
512 MB
Graphics Card:
OpenGL 2.1 and shader model 3 with 128 MB of memory
Hard Drive:
100 MB
Sound:
Any sound card capable of stereo output