In order for you to play Tempest: Pirate Action RPG on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X version Leopard 10.5 and above
Processor (CPU):
2.4GHz Intel Core 2 Duo Processor or better
Memory (RAM):
1 GB RAM
Graphics Card:
NVIDIA GeForce 9600M GT
Network:
Broadband Internet connection
Storage:
300 MB available space