When i open lightroom, prior to installing and updating to yosemite, it would open the catalog stored on the external drive.
the date on that file is 10-17-2014, thus current.
my lightroom catalog is stored on the external drive, same place where all my pictures are.
as for backups, they are identical, same issue.
i dont understand why lightroom when opening my catalog on 10-17 was fine but when i update to yosemite and open exact same catalog its missing 6 months of information, despite the fact date on catalog is 10-17 and is same file on same location on an external drive.
i tried a backup file and same thing.