15 Duplicate File Finder
Duplicate File Finder is one of those apps that does exactly what it says it does. There’s no need for a fancy startup title with a platform as robust and simple as this.
Basically, it combs your Mac’s hard drive for duplicated files. Sure, there are other apps that do this, but Duplicate File Finder is amazingly simple to use. Drag a file into the app and you’ll see every duplicate on your system, including where they’re located. Unlike other options, you can easily find and delete copies in seconds.