Compare a folder of existing photos and import only missing ones to Photos?

[zhenya]

I have a folder of about 40GB of photos that I found on an old drive. Many or most of them already exist in my Photos library, but not all of them. Before I do anything and end up with a lot of duplicates or something, is there a good way for me to have photos examine that folder and import only the images it doesn't have? Thanks!

 

[robgendreau]

Try Snapselect. What's cool is that it can find similars in addition to dupes. For example, it found the same photo I had even though it was on another drive, had been renamed, and cropped. It can work with a Photos library, and send info about picks/rejects back to that library.

 

[zhenya]

Thanks. I already ended up using another program - PhotoSweeper - which is working pretty well, but it's been so long since I did any cleanup like this that it's going to take quite a while for me to go through things and make sure it doesn't delete anything I don't want it to!