Find duplicate files
DupScan is a Cocoa application that searches the duplication files in the specified folders. It detects the duplication files to which all specified attributes (such as name, file type, date modified, CRC) are corresponding.
You can specify suitable comparison condition for searching duplication files. It detects, for example, the files that have the same contents (may have different file names) if you specify "CRC" or "Contents". It also might detect backup copies which have the same name and different contents if you specify "Name" and "Date Created".