Set it more toward Exact Match if you feel PhotoSweeper is being too choosy. At the bottom of this right-hand panel is a slider to adjust the Matching Level. In settings, you can choose to search only for duplicates or a handful of methods to root out needlessly similar photos. To the right of this large browser space is panel to view the settings for your comparison method or image info. Choose a folder or group of photos and drag it to PhotoSweeper's browser. To add photos to PhotoSweeper, use the Media Browser or Add Photos button in the lower-left corner. The app features a large browser for your photos, but it will do the comparison work itself. You can also drag and drop photos or folders from your desktop. PhotoSweeper works with iPhoto, Aperture, and Adobe Lightroom.

The app costs $9.99 in the Mac App Store. PhotoSweeper for Mac identifies duplicate and similar photos and lets you dump the ones you don't need in the trash. Unless you dutifully manage your photo library and cull the extra shots from each photo shoot, your library quickly becomes difficult to navigate and your hard drive cluttered. Freed from the cost of purchasing and developing film, digital photographers can take multiple shots of the same scene in an attempt to capture the perfect shot.

Digital photography is a blessing and a curse.

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