The 4.9.4 version of PhotoSweeper for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The latest version of the program can be downloaded for Mac OS X 10.9 or later.
The unique identifier for this application's bundle is com.overmacs.photosweeper. The actual developer of this Mac application is Overmacs Team. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The following versions: 2.0, 1.10 and 1.9 are the most frequently downloaded ones by the program users. The program relates to System Tools. The program's installation file is commonly found as photosweeperdemo.dmg.
From the developer:
PhotoSweeper is a swift and powerful duplicate photo cleaner built to help you get rid of duplicate or similar photos on your Mac.
You may want to check out more software for Mac, such as PhotoSweeper Lite: Remove duplicate photos in iPhoto, Aperture and Lightroom, which might be similar to PhotoSweeper.