We’ve been interested in how the new Mac Pro performs in Rhino as well.
As an architectural office we started off with 27" iMacs in 2010, using mainly Vectorworks for CAD. Meanwhile, we’ve switched to Rhino, almost exclusively, running Windows7 on these iMacs in Bootcamp.
I completely agree with @mcramblet and the others, backups with Bootcamp are a pain. Also, we have switched all our Software from Mac to PC to avoid rebooting all the time.
Since the projects we’re working on are becoming bigger and bigger, rotating the Rhino models is sometimes beyond laggy, but rather unworkable and no fun. That’s why we borrowed a new MacPro from our hardware supplier to test how it performs in Rhino. I have posted the Holomark2 benchmarks here (Thank you very much, @Holo!).
In absolute numbers, it performs more than twice as fast as our iMacs (32000 vs. 15000 pts) but the real life boost, imho, is not worth the upgrade. Sure, the processor is noticably faster (around 170%) but I have originally had high hopes for viewport performance. Unfortunately, our bigger project files are still very low fps (admittedly less so, but still no joy). Also I had hoped to use the double graphics chips for Vray RT rendering. OpenCL support seems not great at the moment, I only got RT to work occasionally, and it crashed a lot. The graphics drivers seem still buggy, they occasionally crashed in Rhino. All in all I hate to say it but: No Cigar! We got the most “lightweight” MacPro config for testing and maybe the more advanced gfx setups perform better (I’d love to see some benchmarks!). But right now we won’t go for it and get a PC instead (if they only didn’t look so naf…).
My personal recommendation for Rhino would be a fast (clock speed, not # of cores) Processor paired with a Cuda card (nVidia). I’m still not sure about the quadro cards. From what I read over at @Holo’s thread they outperform everything with meshes but when handling Nurbs models they’re on par with a GTX750ti (see @donl517’s setup here) , which costs only 10% compared to some quadros.
Not much wiser now, but the (small) new MacPro is not the answer. I’d recommend an iMac instead, costs the same, has cuda graphics and the thunderbolt display is included