I just created a new catalog, and then the prompt to do the weekly back-up came up. I hit yes, as I always do. I noticed that rather than just do the quick back-up, it asked me to do an "integrity check" or something that took a long time. Then when it was done, to my horror I saw that ALL of my pictures had disappeared! I'm hoping my old catalog is still there somewhere, or that I can at least restore it. If I use Time Machine to go back in time, will that work?
Please help!