Please disable use of Graphics Processor under Lightroom>>Edit>>Preferences>>Performance >>Uncheck "Use Graphics Processor"(MAC)
See if it makes any difference
Then Update your Graphics card from manufacturer's website and then try to enable it in Lightroom again to see if it works fine.
Thank you for your help. Interestingly, when I tried the step you mentioned, the program becomes unresponsive when I click the "Use Graphics Processor" button!! I had checked and the driver for the graphics card is up to date.
Please refer Adobe Photoshop Lightroom Help | Lightroom Graphics Processor Acceleration (GPU) Troubleshooting & FAQ and manually disable use of Graphics card
Here is duplicate Thread Lightroom CC freezes when on Develop mode
I have tried it. The last update is really much worse. I have stopped taking jobs because I can't work on my photos. You guys need another update asap.
The last update is really much worse. I have stopped taking jobs because I can't work on my photos. You guys need another update asap.
To get work done, revert back to CC 2015.1.1 / 6.1.1: http://www.lightroomqueen.com/how-do-i-roll-back-to-lightroom-2015-1-1-or-lightroom-6-1-1/. Wait until Adobe cleans up the mess, and let others do the beta testing.