Doublet Scan 10 is the most advanced program available to take advantage of the latest OS X technologies to find any kind of duplicates on your volumes.
Doublet Scan 10 is an evolution, completely redesigned and rewritten, of
the older Doublet Scan that was designed for the Classic Mac OS and
successively adapted for OS X.
Doublet Scan 10 allows you to search for duplicate files by name, creation
date, modified date, size, type, creator, extension, contents and more. In
addition, this new version looks for MP3 duplicates by their tags: song
name, artist, album, genre, year and content.
Doublet Scan 10 can manage your folders: automatically you can look for your empty folders, Invisible Folders, their contents and more.
In addition, you can use your Imagination to create more customizable criteria with which to search.
As with the older version, you can also find any unique files that you have
on your volumes.