It uses a fast scanning algorithm to delete duplicate files in Mac. Gemini 2 is one easy to use duplicate file finders for your Mac. You can even apply many filters to refine your search criteria according to type, such as songs, pictures, etc. The app comes in various languages, including English, Spanish, German, French, and Japanese. In our list of best duplicate file removers for Mac, the next is Mac Clean, a nifty tool that helps you locate and remove duplicate files of your Mac. Also Read: 11 Best Free Mac Cleaner Software 4.