How to Always Show File Extensions in MacOS

Doing this saves you loads of time in the long run!
Zach Zach (248)
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.

Use "The Unarchiver" to unzip a .rar file for free.
Michael Michael (175)

If you're using a Mac, then you likely have no way to unzip or open a .rar file. I ran into this issue when downloading a firmware update for my Ender 3 V2. There is software available to unzip the .