The iPhoto software can identify and delete or label duplicate photos within the user's library.
This software takes on the time consuming task of comparing the images in your iPhoto library using md5-technology, which ensures that no duplicates can escape undetected. When a duplicate is found, you have the option to either mark it with a description of your choice to make it searchable, or simply move it to iPhotos trashcan.
Duplicate Annihilator works its way backwards from the end of your iPhoto library to the beginning, which ensures that the newest copy of the image is always spared. This means that your most recently acquired pictures will remain untouched, while any older duplicates are efficiently removed.
Overall, I highly recommend Duplicate Annihilator for anyone looking to efficiently manage their iPhoto library and ensure that no duplicates are taking up unnecessary space.
Version 2.23.1: N/A