In order for you to play Farming Simulator 15 on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Mac OS X 10.7.1, 10.8.1, 10.9.1, 10.10.1
Processor (CPU):
2.0 GHz Intel or equal AMD-Processor
Memory (RAM):
2 GB RAM
Graphics Card:
512 MB OF VIDEO MEMORY ATI RADEON HD 2600/NVIDIA GEFORCE 8600 OR HIGHER
Network:
Broadband Internet connection
Storage:
3 GB available space