Photos for iOS and Mac can seem deceptively simple, but it hides a fair amount of search (and editing) power. For example, you can search on any of your devices for something like “water” or “California,” and it will return results for that thing or that place.
If you’ve trained Photos to recognize some of the people in your photos, you can search for them too.
You can learn more about how this works on iOS and on your Mac. Note that, when it comes to identifying people, the faces you identify unfortunately don’t sync between devices.
[via OS X Daily]