Find and eliminate duplicate photos and videos in your iPhoto Library. Duplifinder shows you each original with its duplicate(s).
Double-click on a photo to select it in iPhoto. This helps with evaluating which duplicate to delete.
Select a photo (or multiple photos) and press the Delete key to immediately move them to the Trash in iPhoto.
Click "Move all duplicates to iPhoto Trash" to move all but the first item in each grouping to the Trash.
Note: Duplifinder finds exact duplicates and, in the case of JPEGs, photos which have duplicate image data even if the "metadata" are different. Duplifinder will not identify as duplicates images which have been resized or modified in other ways, even if they look the same.