I have the latest iteration of LR and working on a iMac with OS 10.9.5
While working today all of a sudden I got a message that my catalog was corrupted and that I should use another one. While locating my backup catalogs, I realised LR was not recognising my external drives although my computer was. I can not find a way to solve this problem. Should I reload the software? I can't find an answer in Adobe LR support nor Victoria Brampton's book.
Help please.
Cheers,
Brian