I read this post while looking for users who might have had issues with Zbrush on their Intel Macs. I bought Zbrush on Wednesday and loaded it to my external drive. It worked great on my G4 733 mhz, until we had a power outage last night and my G4 has apparently died. :mad:
I read somewhere that people were having trouble with Zbrush on their intel Macs. I decided to take a chance and try it on my Intel Mac Mini CoreDuo. I booted up Zbrush clicked on the yellow close button on the intro screen. Spinning rainbow cursor of death. Yikes! Force quit! Expletives! Repeat process. Same deal. :mad:
Then I took a deep breath. Yes, there is a gliche, but the fix is easy…patience.
It takes a while for Zbrush to boot up into Rosetta. Pause after you launch, watch the pretty pictures and wait before clicking the close button on the intro screen. After about thirty seconds ZBrush will be running in emulation. Close the intro screen. Zbrush will be ready to go. When 2.5 is released, it will be a universal binary and operate without the pause; we won’t need Rosetta. 
BTW Zbrush WILL CRASH IF YOU’RE IN A HURRY. WAIT! BE PATIENT! It works great, even faster than my G4 (1.5 GB RAM) on my Intel Mac Mini with only 512 mb of RAM.
Happy Zbrushing! :lol: