i recently brought a macbook pro laptop, and i already have a iphone. My iphone is already synced up to my windows computer but i would like to now use my laptop with the iphone. How do i transfer my my music from my itunes libary on my windows which my iphone is synced to onto my new macbook. I have tried to plug my iphone in my macbook but im woried it will wipe it clean. does anyone know how to transfer libarys from windows to mac? THANKS!