Hi, Upon updating my lightroom desktop app on mac i have been having a problem where the folders in lightroom seem to have no images. However they are in lightroom. Not sure if i have to restore the catalog-but dont know how to do that.
There are some reports about the same problem. You could start by trying to upgrade the catalog again to see if this time it does show the images in folders. Just open your old V11 catalog and let Lightroom upgrade it again.