Thank you for the advice. I can’t find where I would set the Open CL to off, and I am not sure what Blackmagic Ultrastudio is, if I am using it, in order to disable it. I am running on 10.9.3 I have a 2x 2.26 GHz Quad-Core Intel Xeon with 6GB memory 1066 MHz DDR3. I cleaned the media folder. still not working.