I have new Macbook pro I just got and my question is stetting up Apple ID. I have three users that use this computer and I set up three user accounts on the computer. They all have their own music, pictures, documents, desktop wallpapers and screensavers so on. The question is stetting up Apple ID how that works. Some people say only one Apple ID per apple computer or apple device and others say each users as their own Apple ID. We want it so each user on the computer as their own Apple ID and for that user account. Some say that is the way to go and well others say only one Apple ID per apple computer. If there is only one Apple ID can that interfere with the other users using the computer that have their own user account? If they download or purchase stuff could this show up on all three accounts if there is only one Apple ID. Could this interfere with the other accounts.