If you use iCloud Photo Sharing, not only can you view photos from others, you can comment and like them too!
Shared Photo Streams are pretty much a private version of an a photo album you'd post on a regular social media site. Only the people invited can view and add photos. But like social networks, you can also comment and like photos and other people in the group will get a notification.
You've always been able to do this in the Photos app for iPhone and iPad, and now you can do it right on your Mac with Photos for Mac!
How to like or comment on photos and videos with iCloud Photo Sharing and Photos for Mac
- Launch the Photos app on your Mac.
Click on Shared in your side menu.
- Click on the Shared album you'd like to view.
Find the photo you'd like to comment on or like and open it.
- Click on the comment icon in the lower left corner of the image. It looks like a speech-bubble with a plus sign in it.
Either click on the smiley icon to like the photo or leave a comment and hit Send.