How to Show Filename Extensions in Finder on a Mac

Have you ever had more than one file with the same name on your Mac, and you aren’t sure which one you need? This type of situation can be confusing when you have similar filenames with different file extensions.

Fortunately you can change a setting in the Finder app so that you can see the filename extensions for your files. This allows you to identify your files more easily, while also providing you with a way to more easily locate files of specific file types. Our tutorial below will show you where to find and enable this setting on your Mac.


How to Show the Filename Extensions for Your Files on a Mac

The steps in this article were performed on a MacBook Air using the macOS High Sierra operating system. Once you complete these steps you will see the extensions of the filenames for your files when you are using the Finder app.

Step 1: Open the Finder app.

mac show filetypes



Step 2: Click the Finder option at the top of the screen, then choose the Preferences option.

finder preferences macbook air



Step 3: Select the Advanced tab at the top of the Preferences window.

advanced finder settings on mac



Step 4: Check the box to the left of Show all filename extensions.

how to show filename extensions on mac



Trying to improve your file organization? Find out how to create new folders on your Mac and make it a little easier to sort and later find your files on your computer.


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