How to Remap the fn (Function) key to ctrl (Control) on Mac

If you're used to CTRL being the bottom left key, this guide will help you.
Zach Zach (249)
5 minutes

I rarely, if ever, use the function key on my Mac keyboard. Moreso, decades of computing has taught my brain to treat the bottom-left key on the keyboard as the Control key.

This short guide will show you how to make your fn (function) key as act a ctrl (control) key in macOS. This option is only available for the Macbook keyboard, not external Apple keyboards.

Mac computer ×1

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MacOS Keyboard Preferences pane

Navigate to System Preferences > Keyboard Settings to open the Keyboard Settings pane.

MacOS Modifier Keys settings

Click the Modifier Keys button and select the keyboard you'd like to configure

It's possible to convert the fn key to ctrl for your external keyboard, Macbook keyboard, or both!

Remapping fn key to ctrl

To remap the fn key to ctrl in macOS, change the Function (fn) Key: dropdown to ⌃ Control. Then, press OK.

To change additional keyboards, simply select the additional keyboard from the Select keyboard: dropdown and repeat this step.

You're all done!

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Because your MacBook is so important for all that you do in a day, it is important to take good care of your Mac battery, monitor your Mac's battery health, and check the cycle count of your Mac's battery when to determine if your Mac needs a new battery. This might sound like a lot of maintenance, but checking your Mac's cycle count is an easy way to determine if your Mac needs a new battery, and it's actually incredibly simple. A battery's maximum cycle count is how many charge cycles your Mac can complete before the battery is no longer able to perform and will need replacing. In this guide, I show you how to check your Mac battery's cycle count and determine if your battery needs to be replaced.