In order for you to play Europa Universalis III Complete on macOS with minimal graphics settings, your computer must meet the following requirements
Operating System:
OS X version Leopard 10.5.8, Snow Leopard 10.6.3, or later.
Processor (CPU):
Intel or PPC G5
Memory (RAM):
64 MB VRAM, 512 MB RAM
Hard Disk Space:
700 MB hard disk space
Video Card:
GeForce 5200, Radeon 9600 or GMA950
Internet:
Broadband connection for Internet play
Registration:
Internet connection for registration