How to add people to shared Photo Streams in Photos for OS X

[iMore.com]

Photos for OS X makes it easy to add people to shared Photo Streams whenever you'd like.
Whether you've created some new shared Photo Streams or want to add someone to an existing one you already manage, adding them with the Photos app on your Mac is pretty straight forward. They'll then receive an invitation to iCloud Photo Sharing they can join on any iPhone, iPad, or Mac.

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