I migrated from my old iMac to a new iMac. Lightroom cc lost all of the links to my pictures. When I open a catalog all of the thumbnails have exclamation points, then I have the opportunity to "Locate" the file. Is there a way to fix this w/out locating 12,000 files?
Did the migration process place all the images in the same folder and or folders they were in on the older Mac? If not all you have to do is use Finder to move them to the folders, IE the PATH, on the New Mac as they were in on the older Mac.
Once that is done LR should have any problem seeing them. Have LR closed when doing this.