How to Always Show File Extensions in MacOS

Doing this saves you loads of time in the long run!
Zach Zach (249)
1 minute

As a website designer, I work with a lot of files—and a lot of file types. Nothing's worse than wasting time trying to fix a problem caused by an overseen missing file extension.

Here are the three easy steps to always show file extensions in macOS.

Posted in these interests:
h/macos87 guides
h/mac128 guides
h/finder3 guides
Arrow to Finder in macOS

At the bottom-left of your dock, click on the Finder icon.

Finder Preferences

Go to Finder > Preferences.

Select "Show all filename extensions"

Make sure that "Show all filename extensions" is checked. Now, you should always see file extensions in macOS.

Change your Mac's appearance to light, dark, or auto.
1 minute

One of the great features of macOS Yosemite and later is Mac user's ability to change the default Light appearance of Macs to Dark Mode.