yes, if you're the only one on the computer, you should be admin and you should have all the permissions necessary, which was the only reason I asked. So you have have your music in the "music" folder in your "username" directory (which is what iTunes does by default)? You tried dragging this folder to an external hard drive which is mounted on your desktop? Does it give you any pop-up warning? I'm 99% sure this should work. I'm not on my computer at the moment, so I'll try when I get home, but if that doesn't work, click "get info" for the music folder and make sure it's not locked or anything (allows read & write). How big is this folder? Is it just taking a really long time to think about copying? Is your external drive the same one you used on the PC? Has it formatted in such a way the Mac can see it?