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Automatically use VoiceOver in the login window on Mac
Set a system preference to automatically use VoiceOver in the macOS login window.
Choose Apple menu
> System Preferences, click Users & Groups, then click Login Options.If Users & Groups preferences are locked, click the lock icon
in the lower-left corner of the window, then enter an administrator password to unlock them.On the right, click Accessibility Options, then select VoiceOver.
To turn on VoiceOver in the login window yourself, press Command-F5. If your Mac has Touch ID, you can press and hold the Command key, then quickly press Touch ID three times.