Warning! If you are motion sensitive and on macOS, don't do the upgrade from within System Settings. Instead, boot into Recovery mode and do an install from there. #accessibility #macOS #macOSSonoma #Apple #Sonoma
The difference is that doing it by upgrade replaces your screen saver with a motion animation and your first log in screen will present a password field over a full-screen motion animation. Doing it from Recovery doesn't seem to do this.