I have a new MacBook Air to replace my ageing trusty Vaio. If I connect my iPad or iPhone to it it implies that the currently blank iTunes will overwrite the iPad contents if I sync. So is there a way to force a sync the other way so the iPad contents overwrite iTunes? I found a programme iMacsoft that claims to do it but the free version is limited to 100 files and the paid one is a bit expensive for a one off requirement.