As I said previously at my home we have 2 users in our iMac.
Using iTunes, in my user I just see my musics and the same in her user (just her musics).
Using my user, how can I see and listen the musics that are in the other user?
I think he means that there are two separate user accounts on the mac. One for him, and one for his wife and he wants to be able to share the music between the two accounts.
I'm not sure how to do this but hopefully I've helped others understand the question!
I see, well the music should be on a shared folder for all users, or you can move the music from whatever folder its in on her user account to a shared account. From there, you should be able to import the music back into the other user account's itunes. Right?
Here's a link to the support document on Apple's website that explains how to share music between different user accounts on a single computer.
http://support.apple.com/kb/HT1203