I upgraded to 10.5 after installing ZB3 and… not a single issue… Neither during the upgrade, not with any of the progs I own. Take the dive, you won’t drown…
Lemo
What OS are you using?
I sent in my request about 2 weeks ago (9/15). I received my download email around 5AM on Oct 1st. Up and running on Oct 2nd.
However, Aurick has stated that folks who were early (Mac)Intel adopters for v.3 were already at the top of the list since they were already in the Cleverbridge system when v3 was first introduced. I was one of those.
Leopard is not only tried and true, it is optimized for Intel. Unless you want to be left out of newer apps like Photoshop CS4, ZBrush, etc. you need to upgrade.
If we were talking about 10.5.0, you might have a point. Not much of one, but a point.
We’re talking about 10.5.5, though, and this is a really weak objection. There have not been a lot of iterations of OS X that made developers change gears to develop only for that most-current version. Leopard was such an upgrade, though.
Stay in 10.4 if you wish. But don’t insist other people carry your own excess baggage.
Sometimes, you just gotta look your fears straight in the face, GhostofMacBeth.
There, see? That wasn’t so bad, right?
I sent my email on september the 3rd and still no news about my upgrade 
I sent my email on september 8th and followed up with an email last week and nothing here either.
Here is an example of how the different smooth brushes worked when applied to the same area:
can we see the ambient occlusion?
NOTE: The brushes were all set to the exact same pressure. The regular smooth brush affected everything more or less equally. Smooth Peaks worked from the high points down. Smooth Valleys worked from the low areas upwards.
I haven’t played with that yet. Has anyone else tried it?
Webhead: That is an excellent depiction of the differences between the brushes, thanks for taking the time to create and post it:) Windows 3.1 users can achieve similar brush behavior by using BrushMod slider and/or Auto CavityMask settings.
We will post further information about these brushes and other 3.12 features within a week or two.
You can achieve this effect in Projection Master with the Glow brush in Zadd or Zsub mode
I’ve played around a little with ambient occlusion masking, it doesn’t show up too well in screen grabs but for what it’s worth here’s an example.
Hey GoM, I was in the same spot you’re in when I heard about ZB3 being only 10.5 compatible.
So I checked all the boards, talked to people here too, and went ahead and upgraded.
Smooth as silk, I immediately did a software update to 10.5.5. Not one problem so far, and actually, my dock moves more fluidly than before, so it seems to be making a more efficient use of the intel processors.
I have a Core2Duo Mac Mini, and I’m doing 4 millon polys easily.
So I recommend the upgrade, unlike panther to tiger, this upgrade seems to be better than the previous.
Ah well - am I correct that there is no ZMaper for OSX, yet?
Is there a way to export Normalmaps larger than 1024 from within ZBrush?
the performance on MacOS rocks, though. 
edit - nevrmind. Found it. I need to get used to some of the interface rearrangements ^^
Please could anyone let me know is they are getting ZBrush to see more than 3gb of ram on their mac? For some reason it appears that Z only sees 3 of my 10, where as I expect it should see 4 at least?
Arran
Its now 7 days… still not received an email. I send an email to the support with my confirmation email attached… and still no answer.
Do you think I have now the right to be angry? 
I’m upset that I still haven gotten an email either. I’m hoping it would be today or the latest tomorrow.