In order for you to play Hamsterdam on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Mac OS X 10.7 or higher
Processor (CPU):
Dual-core 2.4GHz (Intel Core 2 Duo E6600 or better)
Memory (RAM):
2 GB RAM
Graphics Card:
Dedicated graphics card with at least 512MB VRAM (Radeon HD 6750M or better)
Storage:
2 GB available space