Minimum System Requirements
Windows
OS:
Windows Vista/7/8
Processor:
2.5 GHz Single Core Processor or 2 GHz Dual Core Processor
Memory:
2500 MB RAM
Graphics:
OpenGL 2.0 compatible with 512 MB RAM (Shared Memory is not recommended)
Storage:
10 GB available space
Notes:
Version 9.0c; DirectX 9.0c compatible
macOS
OS:
Lion (10.7)
Processor:
2 GHz (Dual Core) Intel
Memory:
2500 MB RAM
Storage:
10 GB available space
Recommended System Requirements
Windows
OS:
Windows Vista/7/8
Processor:
2.5 GHz Single Core Processor or 2 GHz Dual Core Processor
Memory:
2500 MB RAM
Graphics:
OpenGL 2.0 compatible with 1GB RAM (Shared Memory is not recommended)
Storage:
10 GB available space
Notes:
Version 9.0c; DirectX 9.0c compatible
These are the requirements the publisher lists on Steam.
