On Mac OSX High Sierra v10.13.5 (17F7) on a MacBook Pro (Retina, 15-inch, Early 2013), using an external bluetooth connected Mac keyboard in the System Preferences, under Keyboard, there is Modifier Keys... and I've set Caps Lock to be Control, but it remains functioning as Caps Lock key.
How can I get this to take effect? I never want the Caps Lock to lock capitals.