How to share downloaded apps across users on a Mac
Apple IDs used to be two different kinds of things: one was a purchasing account, originally associated with the iTunes Music Store; the other, a sync/email account associated with MobileMe (me.com), .Mac (mac.com), and iCloud. Apple merged the two purposes, but many people possess legacy accounts they continue to use together in iOS/iPadOS and macOS in those distinct ways.
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