My original itunes library is on my Mac which doesn't work well so I don't really use it so it has an older version of OS10 so I can't get itunes 11.

My entire library used to be on my iphone until I upgraded to an iphone5. Because I can't upgrade the itunes, my iphone will not sync with that computer.

I also have itunes on my work computer (this one), but I've never been able to get my library and I have no idea why. It's hooked up to the same account, authorized, etc.

I really have no idea what to do and am really frustrated!!!

Can anyone help?