PhotoSweeper for Mac finds identical and highly similar photos and marks them for deletion. This premium product comes with a demo version and features several image comparison methods with adjustable settings, as well as a beautiful user interface that makes it a joy to use. Another noteworthy feature is the integration with professional photo editors like iPhoto, Aperture, and Adobe Lightroom.
When started, PhotoSweeper for Mac presents you with a few tips on using the software and then reveals a media browser window where you can drop iPhoto, Aperture, or Lightroom photo libraries. If you have a folder with images instead, you can drag and drop it directly into the main window. From the side pane you can either view additional info about the images or choose and adjust one of six comparison methods. The app is speedy, taking 23 seconds to analyze 100 images using a bitmap comparison method and the highest match setting. After the comparison you are taken to the Results page where the app suggests duplicate photos for deletion. Here we had a 100 percent success rate with finding the duplicates. In case of close matches, the app allows you to compare the images side by side.
If you have a large photo library that contains many similar images, using a comparison tool like PhotoSweeper for Mac will help you reduce the number of photos and hence regain disk space. The app comes at a cost, but its great interface and good integration with the OS and other apps fully justify it. You won't regret downloading this one.
Editors' note: This is a review of the trial version of PhotoSweeper for Mac 1.9.4.