DupHunter is a duplicate finder created for Mac that helps you easily and quickly find and delete identical images from your computer. The application comes with a user-friendly interface, immediately finds and erases duplicated pictures, and allows you to preview the found identical files before deleting them.
You can choose between two import methods: a folder or a directory with sub-folders. The program also provides you with two scanning methods: a classic content-based search (looks for cropped, resized or distorted image copies) or timeline-based scan (looks for pictures taken with short time gaps in between).
In my testing, the application took minimum time to scan the imported folders. I tested both scanning methods and the utility immediately displayed all found duplicated images.
So, I have nothing bad to say about this duplicate finder as it offers you exactly what's being stated on the homepage of the developer.
Hence, if you're looking for a simple, yet efficient, image duplicate finder you should definitely give this program a try.