Select version:

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.
Open Users & Groups preferences for me
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.