OS: Windows XP/Vista
CPU: Fast P4 or newer (or equivalent such as AMD) with optional multithreading or hyperthreading capabilities
RAM: 1024MB (2048MB for working with multi-million-poly meshes)
Monitor: 1280x1024 monitor resolution or higher (32 bits)

Minimum System Requirements
OS: Windows 2000
CPU: PIII
RAM: 512MB (1024 MB recommended)**
Monitor: 1024x768 monitor resolution (32 bits)


ZBRUSH 3.1 - macintosh
Recommended:

OS: Mac OSX 10.4 or newer.
CPU: Intel Macintosh
RAM: 1024MB (2048MB recommended for working with multi-million-polys)**
Monitor: 1024x768 monitor resolution set to Millions of Colors

ZBRUSH 2 - macintosh
Recommended:

OS: Mac OSX 10.4 or newer. Macintosh users can use ZBrush 3.1 via PC virtualization software such as "Parallels", or Apple's "Bootcamp".
CPU: Power PC or Intel Macintosh
RAM: 1024MB (2048MB recommended for working with multi-million-polys and when using Parallels)**
Monitor: 1024x768 monitor resolution set to Millions of Colors