PhotoSweeper is more than a simple picture duplicate finder. Besides helping you identify similar images on your Mac, this program also enables you to browse your photo collection in an intuitive and nicely-designed interface, check detailed information regarding your pictures, and compare video files with just a few clicks.
The application provides you with a simple and quick way to locate, compare, and delete duplicated images on your Mac. You can import local directories or libraries from the Photos, Aperture, iPhoto or Adobe Lightroom programs, find important details about your images (file type, resolution, creation date, etc.), check the histogram representation of your digital photos, and much more. Every task is completed within seconds, without slowing down the performance of your Mac.
The program also comes with a small preview screen where you can check the imported pictures before removing the duplicates from your computer.
Another important advantage is the fact that PhotoSweeper supports a wide variety of image formats. What's more, it can compare video files if you're looking for duplicated clips on your Mac.
All in all, I'd say it's definitely worth trying this utility on your computer. It works perfectly, offers you numerous helpful features, and is affordable.