We have two macbook pros and have developed a complex QC presentation.   It 
works great on the newer MBP with the Radeon 6750, and routinely exhibits bad 
behavior on the NVIDIA GT330M: sometimes just locks up the QC app, and often 
when closing the viewer window the system freezes for 60+ seconds.  Both 
machines running latest QC and 10.8.4 and are otherwise clean installs.

This has the feel to me of a video driver bug - we tried the CUDA 5.0.45 driver 
available here: http://www.nvidia.com/object/macosx-cuda-5.0.45-driver.html but 
it didn't fix anything.

Anyone had experience with this? Would an older version of Mac OS X perhaps be 
worth testing on the GT330M?   I could also test the latest 10.8.x and 10.9 
betas (but we shan't discuss that in public).



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