For those who’ve used Apple’s Migration Assistant to move everything from an old Mac to a new one, all your apps, customisation and settings should have migrated too – so you’ll have the correct account details in Mail, your purchased content in iTunes or Music, and messages should up and running.
If you’re already a Mac user, chances are you’re using iCloud for a lot of things: synchronising Safari bookmarks and settings, contacts, calendars, passwords stored
