You should check and compare their content before deletion. Don't immediately delete the files having the same file name.

Take care of the files that have the same file names.

Search for the duplicate files in each file type, including documents, photos, PDFs, etc.

Click the + button in the upper right corner.

Open Finder and click File at the top Finder menu bar.

That's because they make no sense for you but occupy your Mac storage space and consequently, slow down your Mac speed. And useless app installers, duplicate files, and other unneeded files that remain on your Mac can also be considered junk files.

Simply speaking, junk files are system and software cache files, app leftovers, system log files, user log files, Xcode junk files, language files, etc. Every time your Mac starts up and you run software on Mac, junk files are generated. Junk files are temporary and removal files that are usually created by the system utilities and apps that you've installed on your Mac computer. You may wonder what are the junk files on Mac and how are they created. How to use the best Mac cleaner to clean junk files (cheap & free) How to clean junk files from Mac without software (for free)? You can follow it to free up more space on your Macintosh HD. Well, this tutorial gives efficient and easy-to-operate ways to help you clean junk files on your Mac/MacBook. To optimize your Mac performance and keep it in the best state, you need to remove these junk files. That is why your Mac gradually runs slowly or sometimes freezes. The accumulated junk files on your Mac take up more and more storage space on your Mac hard drive.

Mac app clean