Change Spoken Content preferences for accessibility on Mac
On your Mac, use the Spoken Content pane of Accessibility preferences to customize the system voice, be notified when an alert or app needs your attention, and set other options for content your Mac can speak aloud.
To change these preferences, choose Apple menu > System Preferences, click Accessibility, then click Spoken Content.
Choose a voice to speak text and alerts; click Play to hear a sample. See Change the voice your Mac uses to speak text.
Set the speed at which text is spoken.
Have your Mac announce and speak alerts. See Have your Mac speak alert messages.
To customize, click Options, then select a voice, the phrase you want to hear (such as the app name or “Attention!”) before an alert is spoken, and how long your Mac waits before it speaks the alert. Click Play to hear a sample.
Have your Mac speak selected text when you press the specified keyboard shortcut. See Have your Mac speak text that’s on the screen.
To customize, click Options:
Speak items under the pointer
Have your Mac identify items under the pointer, either all the time or only when you use zoom.
You can also set the verbosity level (High, Medium, or Low) and whether to have your Mac wait a shorter or longer time before speaking.
Speak typing feedback
Have your Mac speak what you type, select, or press using the keyboard.
To customize Typing Feedback, click Options:
If your Mac is speaking even though you didn’t set options for it to do so, you may have inadvertently turned on VoiceOver, the built-in screen reader that describes aloud what appears on your screen. To quickly turn off VoiceOver, press Option-Command-F5 (or if your Mac has Touch ID, quickly press Touch ID three times), then deselect the Enable VoiceOver option.