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.