ZBrush 4R2b - Windows

Highly Recommended:
OS: Windows Vista/Windows 7 32-bit/64-bit
CPU: Core 2 Duo or newer (or equivalent such as AMD Athlon 64 X2 or newer) with optional multithreading or hyperthreading capabilities
RAM: 6 GB
Monitor: 1280x1024 monitor resolution or higher (32 bits)

Minimum System Requirements:
OS: Windows Vista/Windows 7
CPU: P4 or AMD Opteron or Athlon64 Processor (Must have SSE2 : Streaming SIMD Extensions 2)
RAM: 1024MB (2048 MB recommended)
Monitor: 1024x768 monitor resolution (32 bits)


ZBrush 4R2b - Macintosh

Required:
OS: Mac OSX 10.5 or newer
CPU: Intel Macintosh
RAM: 1024MB (2048MB recommended for working with multi-million-polys)
Monitor: 1024x768 monitor resolution set to Millions of Colors
(recommended: 1280 x 1024 or higher)