I have been using Lightroom for years. I just installed Lightroom 5 on my MacBook Pro with Software OS X 10.9.3 (Mavericks). I used to be able to select photos in one Lightroom folder and drag them to another. I can no longer drag photos to another folder. Is this a flaw between Mavericks and Lightroom 5.5? Is there painless way to get my photos to the appropriate folder? Thanks!