Does anyone have a recommendation for a method of finding & removing duplicates of photos from their Photos Library. I recently stumbled across four separately imported versions of the same photo, each of a different file size, thanks to multiple people in the family scanning the same photo.
Ideas? Incantations? 
Gemini from MacPaw has been one of the best, and I’ve tried about a dozen.
Most free options I find to be poor experiences. The cost of Gemini is definitely worth it.
Yes, I have Gemini and it seems to work well. I cannot compare it to any competitors though…
I have tried them all and Photosweeper is the best.
It has a lot more options available to determine which images are selected for removal (ie resolution, metadata, location etc) which gives greater confidence in the accuracy of the process
What did you end up using and why?