Since upgrading to 2.1, everytime I launch LR, the fan spins up and LR uses all of my CPU, It crawls to a stop. I have to force quit to quit it.
I turned off my NVIDIA GeForce GT 650M as others have suggested without help. Prior to 2.1, I had no problems on a mid 2013 MBP with 16G of RAM.
Since most of the advice involved shutting o down the graphics card and I did that without success., any other ideas? LR simply does not work.
I suggest to roll back to 2015.1.1 until 2015.3 is released: https://helpx.adobe.com/lightroom/kb/roll-back-to-prior-update.html
You may also try if it helps to deactivate the GPU acceleration as well as some parts of the new import:
thanx for the answer. I already unchecked the Graphics processor without help but perhaps I can go to the previous version
Since returning to LR 2.0, everything is working fine.
Not a permanent solution but better than nothing for now