In order for you to play Rogue Legacy on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Snow Leopard 10.6.8, 32/64-bit
Processor (CPU):
Dual Core CPU
Memory:
2 GB RAM
Graphics:
OpenGL 3.0+ support (2.1 with ARB extensions acceptable)
Hard Drive:
400 MB HD space