I'm looking for a photo de-duper app for Mac, but from a different angle than normal.
If I download a new image from the web, I want to know if I already have it on my Mac or not.
I have had trouble finding a Mac duplicate photo finder that allows me to scan like a reverse image search. They only allow me to scan whole folders to find any and all duplicates, but I only want to find dupes of one image that I specify. If no dupes exist, then it would return nothing.
This is basically this question but for macOS.