Why you have so many duplicate photos
Photos land on your drive in ten ways: imports from Lightroom or Photos, AirDrops from your phone, exports in different formats and backups you ran twice.
The result: the same photo sits under slightly different names on your MacBook, an external drive and your NAS. Finding them by hand is nearly impossible.
Match on content, not on name
File names lie. IMG_4471.jpg and IMG_4471 copy.jpg can be identical, and so can two files with completely different names.
DupliFind compares the contents of every file with a SHA-256 hash. Two photos only match when they are byte for byte the same. 100% certain, whatever the name.
Near-identical photos too
Sometimes a photo was re-exported: different compression, a smaller size, a light edit. They are not byte-exact, but you still want to see them.
The Pro scan finds visually similar photos with a perceptual comparison. You review each group yourself and pick which one to keep.
Delete safely, always one copy kept
DupliFind automatically keeps one copy in every group. The rest moves to a quarantine folder, not gone for good, so you never lose your original by accident.
- Open DupliFind in Chrome, Edge or Brave on your Mac
- Choose your photo folder, external drive or NAS
- Set the scope to Images and start the scan
- Review the groups and keep one copy per group
- Clean up the rest, to quarantine first