Just got my first imac so be gentle with me. although My wife and I have had iPhones and IPads for a little while. But I`m setting it up for me and my wife. I`ve set up user separate user profiles but when i go to itunes in her profile it says something about only being able to download one account every 90 days? It says I can proceed but I wonder if it will wipe my itunes which I`ve already set up downloaded all my media to etc? Can you have 2 different itunes on one computer? We arent concerned about sharing the same library of stuff. Many thanks.