How to use the function keys on your Mac
The top row of keys on your Apple keyboard can control built-in Mac features or be used as standard function keys.
Use the keys to control features
By default, the top row of keys on your Apple keyboard control many different features on your Mac. For example, pressing the keys with speaker icons adjusts the volume.
If your Mac has a Touch Bar, learn about using function keys on MacBook Pro with Touch Bar.
Use the keys as standard function keys
Press and holdwhile pressing a function key. For example, pressing both Fn and F12 (speaker icon) performs the action assigned to the F12 key instead of raising the volume of your speakers.1 If your keyboard doesn’t have an Fn key, try pressing and holding the Control key when pressing a function key.
Change the default behavior of the keys
If you want to change the top row of keys to work as standard function keys without holding the Fn key, follow these steps, depending on the version of macOS you're using:
Choose Apple menu > System Settings.
Click Keyboard in the sidebar.
Click the Keyboard Shortcuts button on the right.
Click Function Keys in the sidebar.
Turn on “Use F1, F2, etc. keys as standard function keys”.2
Earlier macOS versions
Choose Apple menu > System Preferences.
Select “Use F1, F2, etc. keys as standard function keys”.2
1. Standard function keys work differently depending on the app and the keyboard shortcuts that you've set up. Some apps have their own keyboard shortcut settings that you can customize.
2. If you don't see this setting, you might be using a keyboard not made by Apple, and you might need a third-party keyboard utility to change the keyboard functions. Check with your keyboard manufacturer for more information.