The 4.0.1 version of PrimeFile for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The program lies within System Tools, more precisely System Optimization. This free Mac app is a product of Nektony.
From the developer:
PrimeFile is a free utility that finds duplicate files on your Mac in just 3 clicks.
Drag & drop as many folders as you wish and click SCAN. Within a minute the app will give a report with all duplicate files by categories: images, videos, music, archives, documents, and all other specific extensions. It's really easy to see how much space each file takes.
You may want to check out more Mac applications, such as TransparentDock, Peek-a-Boo or DiskFire, which might be related to PrimeFile.