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◦ Instead of selecting Login Window… from the fast user switching menu, select the name of the user who wants to login.
◦ Instead of clicking the Switch User button on the lock screen, enter the password the password of the user that is already logged in or have that user use Touch ID, then use the fast user switching menu to select the name of a different user who wants to login.
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◦ Configure the screen saver to not be displayed on the login window, which will also prevent the screen saver from starting 20 minutes after clicking on Login Window… or Switch User. This can be done by logging in as an admin user and entering the following command into Terminal: sudo defaults write /Library/Preferences/com.apple.screensaver loginWindowIdleTime 0 When the Password: prompt appears, type the password of the user that is currently logged in and press Return (the password being typed at this prompt will not be displayed).
• To stop the screen saver when this behavior occurs: put the Mac to sleep (hold power button for 1.5 seconds on a desktop Mac or close the display on a portable Mac), leave the Mac sleeping for 10 seconds, then wake the Mac.