Minimum System Requirements
Windows
OS:
Windows XP/Vista/7 Processor:
Intel Pentium 4 3.0 GHz or AMD Athlon 64 3200+ RAM:
1 GB RAM Video card:
DirectX 9.0c compatible with 128 MB VRAM Sound card:
DirectX 9.0c compatible Disk space:
13 GB available space 
MAC
Postal III is not officially supported on macOS. However, some users have managed to run the game using Windows emulation software or by installing Windows on a separate partition via Boot Camp
Linux
Postal III does not have an official Linux version. Players have used compatibility layers like Steam Play's Proton or Wine to run the game on Linux systems, but performance and compatibility can vary
Recommended System Requirements
Windows
OS:
Windows XP/Vista/7 Processor:
Intel Core 2 Duo 2.4 GHz or AMD Athlon 64 X2 5200+ RAM:
2 GB RAM Video card:
DirectX 9.0c compatible with 512 MB VRAM Sound card:
DirectX 9.0c compatible Disk space:
13 GB available space MAC
Postal III is not officially supported on macOS. However, some users have managed to run the game using Windows emulation software or by installing Windows on a separate partition via Boot Camp
Linux
Postal III does not have an official Linux version. Players have used compatibility layers like Steam Play's Proton or Wine to run the game on Linux systems, but performance and compatibility can vary
We recommend playing Postal III on a Windows PC that meets or exceeds the recommended system requirements. If you're trying to play on a Mac or Linux, be prepared for potential technical issues and performance changes.
