The system requirements have not been finalized for StepMania 5.
Here are some back of the envelope specs:
- Windows XP+ (Vista and up users: read the installer!); Linux; Mac OS X 10.5+
- 256 MB of RAM
- 400MHz minimum (SSE2 and Multi-core recommended)
- Video card with support for 16-bit color, 32MB video RAM and OpenGL drivers
- Sound card (of course :D)
- Microsoft Visual C++ 2012 Runtime installed (Windows only)
StepMania 3.9 (and variants)
- Windows 98+ (Vista and up users: read the installer!), Linux, OS X 10.4-10.6
- 266MHz minimum (400 MHz, SSE2 or Multi-core recommended)
- 64 MB of RAM
- Video card with support for 16-bit color, 16MB video RAM and OpenGL or Direct3D 8 drivers
- DirectX 8.0 or later (Windows only)
- Sound card
It is possible that you temporally disable your antivirus when you install StepMania.