I am using PSE 11 on Windows to perform a full catalog backup to extenal HDD. The backup complete successfully. I then move teh external HDD and Restore the catalog using PSE 11 on Max OS X (Maverick). After selecting the source and desination for the restore, I get an error message that the selected HDD does not contain a valid backup. I have twice backed up the catalog. The folders on the HDD contqain more than 300GB of data from teh backup. I get no error during the backup process.
I will be eternally grateful to anyone who can help. I will send you much good karma and gratitude for your assistance.
When locating the location from where backup is to be taken, please ensure to select "Backup.tly" file present in the backup folder.