develop module will not respond in Lightroom 6 have tried uninstalling the program and turning of graphics card but this has not solved it any ideas.
It might be the reason of Graphic card.
Please try disabling GPU in preferences.
Click Edit->Preferences->Performance OR Lightroom -> preferences -> performance (MAC)
Uncheck Use graphic Processor
Reopen Lightroom and now check .
Hi Jitendra disabling gpu has worked develop module is now responding.thanks for he help John.
You are Welcome