macOS User Guide
- Welcome
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- Work across devices using Continuity
- Use iPhone as a webcam
- Use iPhone with Desk View
- Stream audio and video with AirPlay
- Use one keyboard and mouse to control Mac and iPad
- Hand off between devices
- Unlock your Mac with Apple Watch
- Make and receive phone calls on your Mac
- Sync music, books, and more between devices
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- What is Family Sharing?
- Set up Family Sharing
- Add a user or group
- Set up Screen Time for a child
- Share purchases with your family
- Watch and listen together with SharePlay
- Share a Photo Library
- Collaborate on projects
- Find content shared with you
- Find your family and friends
- Play games with your friends
- Resources for your Mac
- Resources for your Apple devices
- Copyright
Change the behavior of the modifier keys on Mac
You can change the action that modifier keys, such as Control or Option, perform when you press them.
On your Mac, choose Apple menu > System Settings, then click Keyboard in the sidebar. (You may need to scroll down.)
Click Keyboard Shortcuts on the right, then select Modifier Keys in the list on the left.
For each modifier whose default action you want to change, click the pop-up menu, then choose the action you want performed when you press the key, or choose No Action.
For example, if you’re used to a keyboard that had the Control key where the Caps Lock key is located on an Apple keyboard, you could click the Caps Lock pop-up menu, then choose Control to have that action performed whenever you press the Caps Lock key.
To return the keys to their original settings, click Restore Defaults.