This project would render 2 days ago. Never had any problems like this in my life. I tried it at default and with MP enabled. Not a single project will render. It will hang and look like it will try but no beachball or anything. Then when I try to stop the non-render I get a series of error messages saying there is something corrupted. However I have tried multiple projects created on a multitude of versions over the years and none will render.
I'm running OS X 10.9.5 on a 3.33 6-core Mac Pro with 32GB. I tried repairing permissions and restarting to no avail. Must have changes came in unexpectedly and I NEED THIS VIDEO RENDERED OR I AM SCREWED!!!
update... I am able to render to animation codec just fine. It was Apple Pro Res 422 that refused to render. So problem sort of solved, but certainly not ideal for my workflow here.
Finally had time to troubleshoot and figure it out. I followed all the steps in the troubleshooting article and found a fix. Something got weirded out when I upgraded to CC 2014 in my quicktime components folder. Or they just had some communication issues. So once I reinstalled them (located here: http://support.apple.com/kb/DL1396 ) all Prores renders work as they previously did.
Thanks for all the info guys!