In order for you to play Expeditions: Conquistador on macOS with minimal graphics settings, your computer must meet the following requirements
Processor (CPU):
Dual Core 2.6 GHz or AMD64X2 2.6 GHz
Memory (RAM):
2 GB RAM
Graphics Card:
nVidia GeForce 8600 GT or higher, ATI Radeon X1800 or higher, min. 256 MB VideoRAM, Shader Model 3.0
In order to play Expeditions: Conquistador on macOS with maximum graphics settings, you need a computer with a configuration no worse than the following
Processor (CPU):
Intel Core 2 Duo E8400 or higher, AMD Phenom X3 8750 or higher
Memory (RAM):
4 GB RAM
Graphics Card:
nVidia GeForce 280 GTX or higher, ATI Radeon HD4870 or higher, 512 MB VideoRAM, Shader Model 3.0