Use Live Captions on Mac
Live Captions gives you real-time captioning of audio—allowing you to easily follow the audio in any app, such as FaceTime or Podcasts, and in live conversations around you. Audio is processed on device.
Note: Live Captions is currently in beta. Live Captions is available only on Mac computers with Apple silicon, and is not available in all languages, countries, or regions. The accuracy of Live Captions may vary and should not be relied upon in high-risk or emergency situations.
Turn Live Captions on or off
On your Mac, choose Apple menu
in the sidebar, then click Live Captions on the right. (You may need to scroll down.)Turn Live Captions (Beta) on or off.
The Live Captions window appears and stays on screen. If you want to hide the window when no audio is detected, click the Live Captions icon in the menu bar
, then make sure Keep Onscreen isn’t chosen.Note: The first time you turn on Live Captions, language data is downloaded to your Mac. You must be connected to the internet.
You can also turn on Live Captions in FaceTime.
Use Live Captions
When you turn on Live Captions on your Mac, audio is transcribed in real time in the Live Captions window.
You can pause captioning at any time, without turning Live Captions off. Do one of the following:
Click the Pause
button in the Live Captions window. Click the Play 
button to restart captioning.Click the Live Captions icon
in the menu bar, then choose Stop Live Captions. Choose Start Live Captions to resume captioning.
If you use a braille display with VoiceOver, when Live Captions is turned on, you can access the Live Captions window from the System Dialogs menu in the Application Chooser. See Use Live Captions with a braille display.
Have what you type spoken aloud
While in a conversation—for example, during a video call or an in-person conversation—your Mac can speak what you type.
In the Live Captions window on your Mac, click the Type to Speak field, enter what you want to say, then press the Return key.
To indicate your text is being read aloud, a message is shown in the top-left corner of the Live Captions window.
Note: If you don’t see the Type to Speak text field, click the Live Captions icon
in the menu bar, then choose Type to Speak.
Change the audio source for captioning
When you use Live Captions on your Mac, you can switch between captioning the computer’s audio output or its microphone.
Do one of the following:
Click the Microphone icon
in the top-right corner of the Live Captions window to switch between your Mac computer’s audio output and its microphone audio.Click the Live Captions icon
in the menu bar, then choose Computer Audio or Microphone.
Customize the appearance of captions
On your Mac, choose Apple menu
Change any of the following:
Font family: Change the font used in captions.
Font size: Increase or decrease the text size used in captions.
Font color: Change the text color used in captions
Background color: Change the background color of the Live Captions window.
You can resize the Live Captions window by dragging any edge, and change its position on the screen. To restore the window to its default size and position, click the Live Captions icon in the menu bar, then choose Restore Default Position.
You can also set an option to show or hide the Live Captions window when no audio is detected. Click the Live Captions icon in the menu bar, then choose Keep Onscreen to always display the Live Captions window. Don’t choose that option if you want to hide the window when no audio is detected.
You can use Accessibility Shortcuts to quickly turn Live Captions on or off.
You can also use keyboard shortcuts for many Live Captions actions, such as turning them on or off and changing the audio source. To view and customize available shortcuts, choose Apple menu 
in the sidebar (you may need to scroll down), click Keyboard Shortcuts on the right, then click Accessibility. See Use macOS keyboard shortcuts.