I too have issues with Camera RAW freezing with the saving to jpg. I am running El Capitan on a Mac with Adobe CC updated.
The discussion thread from 2012 implies this is a drive problem, but is still listed as Not Solved. The October, 2015 thread for the same problem is also Not Solved even with the recommendation that this is a permissions problem (insuring read/write for user does not solve the problem. Why is it so difficult to get Adobe's attention to fix the problem when so many users have the same issue?? I guess I will have to spend 3 hours (1 hour on hold - 2 hours with remote in) with tech support tomorrow. I cannot go forward If I cannot get my images from RAW to JPG.