Since updating to 10.11.4 I seem to have broken QuicklookUIHelper and Quicktime X. In console I see the error "(kFigMediaValidatorError_VideoCodecNotSupported)" despite having the Prores Codecs installed (I have Compressor 4).
I can no longer play these videos in QT or finder, but they will play in Premiere after I long pause. I'm at a loss how to fix it. Has anyone else seen this error? I can only imagine that the codecs simple aren't detected by those apps or whatever points to them has been broken.
I'm on a late 2009 Mac Pro 4.1
Thanks.