After importing my iPhoto Library on a Mac, I have way too many folders. I want to create master folders by year and move the existing folders to the appropriate year. I tried moving them in Finder but that just messed up the catalog.
Quick Tip – Don’t Move Photos Behind Lightroom’s Back « Julieanne Kost's Blog
Using the below procedure you should be able to "reconnect the moved folders that now reside in the YEAR top-level folders.
Retrieving data ...