In order for you to play Battle for Wesnoth on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X 10.12 or later
Processor (CPU):
Dual-core 2.0 GHz or better
Memory (RAM):
2 GB RAM
Storage:
800 MB available space
In order to play Battle for Wesnoth on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
macOS 10.15 or later
Processor (CPU):
Dual-core 3.2 GHz or better
Memory (RAM):
4 GB RAM
Network:
Broadband Internet connection
Storage:
2 GB available space