In order for you to play Super Meat Boy on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
10.7 through 10.9 have been tested.
Processor (CPU):
Intel based Macs only.
Memory (RAM):
1 GB RAM
Graphics Card:
Graphics Card made within the last 4 years (Pixel Shader 3.0, Vertex Shader 3.0)
Hard Drive:
300 MB
Controller Support:
Microsoft Xbox 360 Controller or Direct Input compatible controller