Fast scan engine and checksum algorithms SHA-1. Locate and delete duplicate files, even if they are in remote corners of your system (such as iPhoto and iTunes library). Duplicate Finder scans your entire hard drive, no matter how many files you have on your Mac. Explore the scan results and manually select the files to delete, or better, let Smart Select do all the work. Do not worry about losing files by mistake. Simple things done, moves to the Trash duplicate files and allows you to return them with one click.