Yeah man.
Worked marvelously for me. Along the way of computer migrations and moving from WIndows to Mac about 10 years ago, I ended up withroughly 25% of my 60K in photos being duplicates. This app worked exactly as advertized. Highly recommended.
Now onto my next task of removing bad pictures. You know, the ones of the ground or with my finger covering the lens. If only they made an app for that! Ha!
TreAdidas about
Duplicate Cleaner For iPhoto