https://bugs.winehq.org/show_bug.cgi?id=38216
--- Comment #29 from Ken Thomases ken@codeweavers.com --- (In reply to Sergey Isakov from comment #20)
No, I am using clear OSX 10.9.5 with official drivers.
This is contradicted by your own attachment 51062 from comment 15:
<System>Mac OS X 10.7.5 (11G63)</System>
I think the name of the renderer taken from the card BIOS. In this case it will be the same as in linux. I don't know how to check this.
I have never seen nor heard of a renderer name like yours ("ATI Radeon Turks XT Prototype OpenGL Engine"), which is why your patch is being questioned. A search of the web for that string shows very few hits, as opposed to, say, "ATI Radeon HD 4850 OpenGL Engine" which comes from my 27-inch iMac, Late 2009 running 10.9.5.
Your attachment says the model is "iMac12,2". According to my searches, that's the 27-inch iMac, 2011. See http://www.everymac.com/ultimate-mac-lookup/?search_keywords=iMac12,2 and https://en.wikipedia.org/wiki/IMac_%28Intel-based%29. According to those links, those have an AMD Radeon HD 6750M, AMD Radeon HD 6770M, or AMD Radeon HD 6970M. According to what I can find, those are codenamed Barts LE (67xx series) or Cayman (69xx series), not Turks.
Is this a hackintosh or have you replaced the GPU somehow?
Anyway, we're just trying to understand the discrepancies between what you're reporting and everything we've ever seen before from OS X and Mac hardware.