Wow!! What a Great App!!
Between switching from PC to Mac and learning to use iPhoto I ended up with almost 76,000 photos. This App found almost 18,000 duplicates and has put me well on the way to being able to organize my photos again!! It took several hours to scan and clean, but considering it recoverd almost 25 GB of hard drive it was well worth it!! Hint - turn off your screen saver and power saver during the scan as the computer will go to sleep during processing if you have a lot of photos to scan.
Buddy Jack about
Duplicate Cleaner For iPhoto, v1.5