I searched but couldn't find this info.- My wife and I each have a separate login account on our imac as well as separate AppleIDs. When logged in, I don't see her itunes songs, ipod apps, etc., and she dosen't see mine, either. If I buy an app will it install and be usable for her when she logs in as well? I'm not at home right now to try it, just curious. I don't want to have to buy an app twice for use on the same computer... Thanks!