My wife uses an iMac with OS 10.9.4 and LR 5.5. Her photos and LR catalog are on an external hard drive. Every time she launches LR it displays the dialog asking to select a catalog however no catalogs are listed. She browses for the catalog and selects it, LR opens the catalog and starts out with the "tips" screen as if she was opening LR for the first time. I've set the LR Catalog preferences indicating that the catalog she uses should open upon the opening of LR, I've selected "do not show again" for the "Tips" screen but nothing changes the next time LR is opened.
Any clues as to how to fix this will be appreciated.
Sounds like the preferences have become corrupted and need to be reset. Of course, they'll act exactly like what you're seeing on first restart, and you may need to find the catalog you were actually using, rather than the default one Lightroom creates.
Thanks Sean. Fixed the problem, along with a couple of others re LR. Much appreciated.