Running LightRoom CC 2015.8 on MacOS 10.12.2 and I have lost the ability to Synchronize Folders in my catalog. Not sure what happened. I’ve tried rebooting the system but cannot get the feature to work. I’ve also noticed that my Auto Import feature stopped working and I can no longer bring up the Auto Import Settings window.
I am also receiving a message when closing LightRoom that my catalog is over 4 GB, but file size is only showing as ~598 MB.
Had to reset preferences to get things back. Adobe Support helped resolve.