Anyone facing the same issue.?
After updating the OS Yosemite to Sierra Lightroom 6.7 got noticeably slow down. Shortcut keys are not responsive as earlier, takes a second or two to respond to the shortcuts.
Or Adobe is planning to fix it via an update to Lightroom.?
Please re-install the Lightroom and update it to the latest version
Download link: Install Photoshop Lightroom
Once you finish doing the above step, please uncheck the graphics processor from the performance tab from the Lightroom preferences.
Let us know if that helps.