Hi Jérome,

unfortunately I did not find any solutions for this, but my users said when 
they done a clean install instead of upgrade to 10.8 this issue (and a lots of 
all in other apps) gone to be solved.

Tamas 

On Feb 26, 2013, at 5:35 PM, Jérome Foucher <jerome.fouc...@axinoe.com> wrote:

> Hello,
> 
> My customers that recently upgraded to 10.8 on their MacPro suddenly started 
> to have crashes that they never experienced before when running 10.7
> 
> Googling and searching the list archives, I just came upon a similar issue 
> that's been reported on this list in august 2012.
> I cannot find any solution posted on the list. Maybe the person who 
> originally reported the bug (named Tamas Nagy) has found a solution outside 
> of the list. If so, I would appreciate if he could share it with us.
> 
> Anyway, here's what happens:
> My app draws a quartz composition in an overlay window on top of a window 
> where a quicktime movie is playing.
> The composition is playing inside a NSOpenGLContext. I don't use a QCView.
> 
> The composition rendering is done on the main thread with a timer firing 
> every 1/60th of second
> 
> 
> Each crashlog looks the same :
> 
> Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
> 0   libGPUSupportMercury.dylib          0x067b3daf gldObjectPurgeable + 328
> 1   GLEngine                            0x0a7465d8 gleObjectPurgeable + 402
> 2   GLEngine                            0x0a663e0b 
> glObjectPurgeableAPPLE_Exec + 251
> 3   com.apple.QuartzComposer            0x93ca224f -[QCImageTextureBuffer 
> setPurgeable:] + 348
> 4   com.apple.QuartzComposer            0x93c7758d -[QCCache(Internal) 
> _runGarbageCollectionForSize] + 266
> 5   com.apple.QuartzComposer            0x93c7ca1d -[QCCache(Private) 
> _collectResourcesForSize] + 73
> 6   com.apple.QuartzComposer            0x93c7ca88 -[QCProviderImageCache 
> _collectResourcesForSize] + 85
> 7   com.apple.QuartzComposer            0x93c7c0a6 -[QCImageManager 
> optimizeCaches] + 1644
> 8   com.apple.QuartzComposer            0x93c7b912 -[QCImageManager 
> reclaimResources] + 243
> 9   com.apple.QuartzComposer            0x93c86fd5 -[QCGraphicsContext 
> renderPatch:time:arguments:] + 164
> 10  com.apple.QuartzComposer            0x93c85fb3 -[QCOpenGLContext 
> renderPatch:time:arguments:] + 552
> 11  com.apple.QuartzComposer            0x93c85d76 -[QCPatch(Runtime) 
> render:arguments:] + 78
> 12  com.apple.QuartzComposer            0x93caccf2 -[QCRenderer 
> renderAtTime:arguments:] + 57
> 13  XXXXXXXXXXXXXXX                      0x0001fc7a -[Schedule render:] + 206
> 14  com.apple.Foundation                0x949a57d4 __NSFireTimer + 117
> 15  com.apple.CoreFoundation            0x95eb69b6 
> __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 22
> 16  com.apple.CoreFoundation            0x95eb6355 __CFRunLoopDoTimer + 709
> 17  com.apple.CoreFoundation            0x95e9b162 __CFRunLoopRun + 1730
> 18  com.apple.CoreFoundation            0x95e9a63a CFRunLoopRunSpecific + 378
> 19  com.apple.CoreFoundation            0x95e9a4ab CFRunLoopRunInMode + 123
> 20  com.apple.HIToolbox                 0x9501f15a RunCurrentEventLoopInMode 
> + 242
> 21  com.apple.HIToolbox                 0x9501eec9 ReceiveNextEventCommon + 
> 374
> 22  com.apple.HIToolbox                 0x9501ed44 
> BlockUntilNextEventMatchingListInMode + 88
> 23  com.apple.AppKit                    0x961e3a3a _DPSNextEvent + 724
> 24  com.apple.AppKit                    0x961e326c -[NSApplication 
> nextEventMatchingMask:untilDate:inMode:dequeue:] + 119
> 25  com.apple.AppKit                    0x961d96cc -[NSApplication run] + 855
> 26  com.apple.AppKit                    0x9617c6f6 NSApplicationMain + 1053
> 27  XXXXXXXXXXX                      0x000028f5 start + 53
> 
> 
> Of course this never happens on my machine... Maybe because I'm using an old 
> iMac.
> 
> The crashes occur very often on new MacPros. The machines are up-to-date. 
> Running 10.8.2 with all firmware updates applied.
> 
> Any hint / solution ?
> 
> Thanks
> Jérome
> 
> 
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