In order for you to play Tavern Master on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
Mac OS X 10.5 Leopard
Processor (CPU):
Intel Core 2 Duo 3.06Ghz or better (Intel Core i5 2.66Ghz or better recommended)
Memory (RAM):
3 GB RAM
Graphics Card:
NVIDIA GeForce GT 120 series or higher / ATI RADEON HD 4670 series or higher
Storage:
3 GB available space