Edit >> Preferences >> Performance (tab)
Uncheck the box:
Use Graphics Processor
Does that make any difference?
Sadly I have this same issue, for 3 days now its been crashing and I can't do a thing. It keeps freezing, I thought it was space on my computer so I deleted almost 600 or more photos and still the same issue.
The problem is that the installer of each upgrade package activates the fuction "Use Graphic Processor". So we must disable this function after each upgrade again and again.
In my case disabeling the "Use Graphic Processor" didn´t make it work it still crashes.
But when i manually went in to the Nvida website and downloaded a new driver for my Nvida Geeforce Gtx Titan card that solved the problem (so far no problems).
Thanks for all your replies.
After cleaning my Mac of space, Uninstalling the software, and reinstalling
everything worked fine. Thanks Again for your response I'll keep that in
mind if the problem reoccurs.