When I open LR6 in the library mode then go to the develop mode I get a hazy screen and at the top left of the screen I get a message that says develop mode not responding. I have to close down LR and then re start LR to get back to the library mode. I never did get the develop mode to open. Any suggestions? thanks
Try turning off the GPU acceleration. Go to PReferences->Performance tab and then uncheck the box there.
problem solved. Thanks.