How to Deauthorize All Computers in iTunes
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iTunes Authorization grants the ability to access your own stuff obtained from iTunes, but each Apple ID has a maximum limitation of five computers per Apple ID that can be authorized. Because of that five computer limit, you may eventually run out of available authorization slots for an Apple ID, and a new Mac or Windows PC may be blocked from accessing purchased iTunes content until that new computer is authorized. If you have hit the authorization limit of five computers, and/or you no longer have access to a computer to directly deauthorize iTunes on a specific machine, your next option is to use a “Deauthorize All” function instead.
Using “Deauthorize All” will deauthorize every computer attached to the Apple ID from accessing iTunes content, unless or until those computers have been re-authorized again through iTunes.















