Apple’s Photos app on the Mac can identify thousands of different objects in your photos. This makes it easy to find photos based on their content. Some of what you can find include objects (cars and trains), scenery (beaches and forests), location, and even some events (weddings and parades). This is both big fun and useful for those times when you can’t remember when you took a photo, but do remember what’s in it, like a cat, camera, or carousel. To perform a search like this, type the search term into the Search field on the right side of the Photos toolbar. From the list that appears, choose the Category result. In macOS 10.13 High Sierra’s version of Photos, you can filter your results from the Showing menu at the upper right of the window. I will say that this feature isn’t perfect, so you may see some odd results or miss some photos, but it’s way faster than browsing manually!