When attempting to download an app from the App Store, I am unable to change the Apple ID as the box is disabled, as shown below. How can I change the Apple ID?
1 Answer
Store Menu > Sign Out. Then you should be able to sign in to another ID.
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Does not work if the original Apple ID has installed software on the Mac (such as iMovie) and you're trying to update the software. Better answer here: apple.stackexchange.com/questions/129773/…– DanBSep 28, 2017 at 21:24