This post was published 6 years ago and the download links can be irrelevant.
Scroll down to see the links and check these – maybe you will be lucky!
Search Duplicate Files v1.0.1 Bilingual MacOSX 234KB
This app helps you to find duplicates of an given file. It compares the file size and the file content. It compares NOT the file names. The App is very fast and doesn’t index the scanned volumes or folders. Because of this you don’t wast extra disk space. It is possible to scan files on internal, external or network disk drives. The interface is very clean and easy to use.