If you have photos on your Mac, there are almost certainly duplicates. Maybe you copied a folder when you meant to move it, or imported twice without realizing it, or even made some minor edits but kept the original around. Regardless, these extra shots take up valuable space on your hard drive. Gwinno Software’s PhotoSweeper ($10) exists to clean up those duplicates. Instead of working with just one app, it’s a solution for iPhoto, Aperture,…
