In order for you to play Pinball Arcade on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Mac OSX Lion or Mavericks
Processor (CPU):
Intel Core 2 Duo 2.8GHz or equivalent
Memory (RAM):
1 GB RAM
Graphics Card:
OpenGL 2.0+ support
Network:
Broadband Internet connection
Storage:
2 GB available space