In order for you to play Farlanders on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
10.7+ Lion (64 bit)
Processor (CPU):
2.0 GHz Dual Core Processor
Memory (RAM):
4 GB RAM
Graphics Card:
Intel HD Graphics 4000 or greater
Storage:
1 MB available space
In order to play Farlanders on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
10.12+ Sierra (64 bit)
Processor (CPU):
3.0 GHz Quad Core Processor
Memory (RAM):
4 GB RAM
Graphics Card:
NVIDIA GeForce GT 650M (1GB GDDR5) / Intel Iris graphics or greater
Storage:
1 MB available space