Did some searching, couldn't find the exact answer to this, apologies if this is covered extensively elsewhere... My macbook pro contains my main iTunes library, which I sync my iPhone and iPad too. I'd like to move all that to my macbook air (which is also authorised under the same iTunes account), and then sync my idevices to that. Does anyone know the exact procedure? I don't want to rush into just copying stuff to my mba and then hit some inevitable authorisation/drm issue that I was unaware of. Thanks.