Hi Reed
How have you found things working out with 10.9.5? I just updated from 10.9.3 which was having irregular problems when rendering raw S-Log footage, and found this thread which seemed to be touching on some similar issues.
This is just the latest in a long line of issues with the new Mac Pro which I initially thought were down to driver clashes and software glitches – reading this thread has me wondering whether there is a fundamental issue with certain GPUs.
As an aside, in my limited testing so far I have found that when playback/render glitches occur whilst playing back in my timeline, I can switch from GPU rendering to Software Only (throwing out the old renders), and then back again and this seems to have me up and running without issues. But I have yet to test this theory to destruction.
Alexander Goff