How to Subscribe to Shared Album in Photos App?

If you have an iCloud account, other iCloud users can invite you to subscribe to their shared albums and vice-versa. Once you have subscribed, you can view, comment and download photos and videos from the shared album. If the owner of the album allows you, then you can add new photos and video clips to the album. When you receive an invitation to a shared album, the new album appears in the "Shared" pane of Photos app with an invitation icon.

To subscribe to a shared album, click "Shared" located in the toolbar. Open "Activity" album to see the invitation and click "Accept" button. If you don't want to subscribe to the shared album, then click "Decline" button. You can unsubscribe from a shared photo album at any time.

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