Doublet Scan is only for Classic Systems, it doesn't work properly on Mac OS X.

At last! A great program to find all the doublet files on your hard disks. It' s very easy to use: Load the directory of your hard disks and Scan for the "doublet" files... after these two easy steps, you 'll be able to select all the duplicate files you want to eliminate and move them to the trash.

Doublet Scan 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 can manage your folders: automatically you can look for your empty folders, invisible folders, their contents and more. Also, Doublet Scan 10 allows you to create dozens of combinations of criteria with which to search. As with the older version, you can also find any unique files that you have on your volumes.