In order for you to play Unmemory on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
macOS 10.12 Sierra or later
Processor (CPU):
2.4GHz Intel Core 2 Duo
Memory (RAM):
2 GB RAM
Graphics Card:
NVIDIA GeForce 320M graphics processor with 256MB of DDR3 SDRAM shared with main memory
Storage:
3 GB available space