I am having the same jitter-stutter issues. I am using ZBrush4R2, Intuos4, and Mac 10.7.3 (Lion). There are no jitter problems when using a separate mouse or the trackpad, but the second I bring the pen to the tablet the jittering begins.

got the same problem just bought a new iMac for for zbrush and can use it. did anyone solve it ?

Hello, thank you all for share this valuable info.

I recently bought an Imac and it came with Lion 10.7.2 (11C74) installed. I was very happy because I said to myself "Yes at last I can practice 3D with a nice machine" and yesterday before install, I decided to search info about how some 3D app works in the system and found these sad news.

I dont know if at the moment the upcomming Zbrush R3 solves those issues just hope it does. My doubt is if I install Snow Leopard, Zbrush 4 / Zbrush 4 R2b will work fine without those issues with Wacom tablets ?

Thanks Again for your attention.

I just picked up a Mac because I thought that Zbrush would run better. I should have read comments across the web about it first…

I'm having the lag problems and I see that as soon as I touch the stylus to my Cintiq or even my Bamboo the Activity Monitor shoots up to around 100%. When using the mouse it's about 1%. I'm pretty disappointed about this and I can't see any resolution on any site I visit. The closest I can get is the pseudo fix listed at the top of the page which makes Zbrush usable at least.

I know the last comment here was in February but has there been any updates? I have the latest driver dated 14 June (6.3.2-w4). Any information would be greatly appreciated.

After posting this I found a user on Zbrush Central who had an interesting solution. He suggested installing Steam and running it in the background while using ZBrush. I just tried it, while I still had to turn off Multi Draw it works great! I don't know why it works but it does. Just wanted to throw another solution for anyone that may need it.

Do these problems only occur when using a tablet?

To confirm:

Just purchased a wacom intuos 5 L and I too get the stuttering in zbrush 4 R3 using osx lion and the latest wacom drivers. When I use the same wacom on a mac with osx snow leapard and zbrush 4 R3 it works perfectly.

I can only assume then that it is an issue with lion… the problem of course is how do we get it fixed? This intuos wasn't cheap and is pretty useless at the moment.

Does this still happen with Mountain Lion? Currently using Lion and getting the stuttering problem.

Latest drivers with Mountain lion and the same s**t! The best thing is that the new iMacs don't support snow leopard. (Render times were twice as long compared to Lion)

I wish i could bring this piece of technology back to appstore.

Chris

Strangely I get the same delay problem with my MacBook Pro but not my MacPro.
Both have Moutain Lion, both ZBRush 4R4 and both connected to the same Cintiq !!

I wonder if it's the GPU?

Anyhow my mac pro runs smoothly without any jitter.

@Mustafa

I have ZBrush 4R4 installed and a Mac Pro, my problem is that the CPU is 100% all the time when running ZBrush 4R4. Wondering if yours is like that too?!

Argh… this piece of crap doesn't work… My Bamboo Fun tablet won't work on my office's 21.5-in Mid-2011 iMac, but my home's 27-in Mid-2011 iMac's Intuos 4 tablet DOES work flawlessly. Whatever the problem is… it definitely makes the tablet useless in ZBrush…

Same issue here on Mountain Lion, but with a Bamboo Pen & Touch. Using latest Wacom driver (5.2.6-5) and no luck. I'll have to install Snow Leopard again on a separate partition so I can boot to it for hassle-free work.
As a Mac-computer-for-content-creation fan and completely knowing that the following is not gonna happen, my very humble and very likely non-visionary opinion is:
Apple should re-issue their OS X 10.6.8 as "OS X Pro" and maintain it for at least 5 more years, and keep developing their Mac iOS X transgenic Lion for iDevice lovers.

Actually, ZBrush does not work fine if you use a Wacom tablet or at least an Intuos 3 or 4. Either the tablet's driver, ZBrush or something on Lion's side leads to jittering and stuttering when drawing, which practically makes it unusable. It starts fine, it works fine if you use a mouse to work, but it does not in conjunction with a tablet. (At least on two of my three Macs I tested it with.)

@ Martin, You're an idiot.. Truly.
I've NEVER had any issues with zbrush+Wacom, quite to the contrary.
Maybe you should return two of your 'macs' and keep one just for posting more nonsense.

Dan Bolivar is right… Zbrush and wacom are pettry much brothers :S

@ Dan: I invite you to come here to my office and take a look. After you've seen what I am talking about first-hand, I invite you to take a closer look at this issue and you will probably find out that there are some Mac models where this error occurs and others where it doesn't.
And after that, if you still think that I'm an idiot, you can stand before me and tell this to my face instead of here, anonymously. You seriously need to take a minute and think about your manners. I'm happy that you don't have any issues with ZBrush and Lion, but that probably has nothing to do with you being such a non-idiotic genius, but with the hardware combination you use. Oh, and maybe you find the time to take a look in the official ZBrush support forums where you'll find plenty of others who are "true idiots" as well.
And now go f…eel yourself.

I am having precisely the same problem that that idiot Martin is. I truly wish I was smarter like Dan

The note above works!.. Truly.

I've confirmed this too. The trick to disable multidraw works, seems like a shame though. No fix to this?

Same problem here. I even bought more ram because somebody suggested on Zbrush forum that it should do the trick. But it did not. I tried with new wacom 6.2 driver (for intuos4) and tested on new Zbrush 4 r2b, but still same jittering-stuttering when drawing in Zbrush. Disabling the multidraw makes sculpting a bit more smoother, but with higher polycount lion starts to freeze much more earlier than the snow leopard. (lol)
I mean this is serious issue. Some people has this problem and others don't. I still haven't heard any solutions from wacom, nor pixologic, nor apple.