Photo Deduplicator is a third-party utility for Apple macOS that takes photo files as input (like JPEG, PNG, GIF or RAW format files) and identifies byte-wise identical, time-wise related or time-wise and content-wise similar photo files. It then allows you to mark photo files individually or based on certain criteria automatically for removal. Removal can mean putting them into your Mac's trash bin or moving them to a selectable output folder.

Photo Deduplicator can be downloaded and installed for free (like in "at no charge") from the Apple App Store, where you can also check out the many reviews and ratings if in doubt:

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