I've wanted for ages to clear out my Photos.app library of, let's face it, mostly gigabytes of banal kid photos. I also wanted to try out the Apple Vision framework for analyzing photos. Almost everything else that I found out there just compared metadata or histograms, and both was useless at finding the best photo in a series, or even identifying a series.

This uses the Vision framework to look at stuff like facial expressions, focus, picture quality. It also has keyboard shortcuts that make it really fast to review, so I managed to delete about 150 GB of photos by mostly pressing "return" over and over again for a couple hours. (It has an autopilot mode, but even though I'd say it gets things right from my perspective about 90% of the time, I didn't trust it completely on my kid photos. Might be great though on particular albums that weren't especially important.)