Hi All,
I am very interested in purchasing Zbrush 4, I am concerned about my system as to its ability to work with version 4.
My system is as follows:
2GHz Intel Core2 Duo
4 GB 667 MHz DDR2 SDRAM
ATI Radeon HD 2400 XT
OSX 10.6.4
My main worry is the 2400!
any help/advice would be appreciated 
cheers,
David
Zbrush performance doesn’t rely on your graphics card. I’ve used the same card on an iMac without issue.
http://www.pixologic.com/zbrush/system/
ZBRUSH 4 - MACINTOSH
REQUIRED:
OS: Mac OSX 10.5 or newer
CPU: Intel Macintosh (Must have SSE2 : Streaming SIMD Extensions 2)
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)
Thanks Richard. what I really needed to know i think, was about the CPU: (Must have SSE2 : Streaming SIMD Extensions 2). I assume that I am also ok on that matter, correct? 
If your cpu was made in the last 5 years it’ll more than likely be ok for SSE2
Core 2 duo is fine.
http://en.wikipedia.org/wiki/SSE2
CPUs supporting SSE2
AMD K8-based CPUs (Athlon 64, Sempron 64, Turion 64, etc)
AMD Phenom CPUs
Intel NetBurst-based CPUs (Pentium 4, Xeon, Celeron, Celeron D, etc)
Intel Pentium M and Celeron M
Intel Core-based CPUs (Core Duo, Core Solo, etc)
Intel Core 2-based CPUs (Core 2 Duo, Core 2 Quad, etc)
Intel Core i7
Intel Atom
Transmeta Efficeon
VIA C7
VIA Nano
Thank’s Richard 
Cheers,
David