I have a large number of duplicate photos in the Apple Photos library after regrettable selecting "consolidate photos" from the menu. It appears to have made 2 copies over every photo I had when I did that, so I have 3 of every photo in my library My research has turned up good reviews for Photosweeper( https://itunes.apple.com/us/app/photosweeper/id463362050?mt=12 ) , but the app with the most ratings on the App store is Duplicate Photos Fixer ( https://itunes.apple.com/us/app/duplicate-photos-fixer-pro/id963642514?mt=12 ) . I haven't used either of these but if price = trustworthy then Photosweeper wins. If "most positive reviews" = trustworthy, then the other app wins. Has anyone here used either of these app to remove duplicate photos, or even another app that you would recomment?