NSStatusBarButton keep highlighted

Question

As of OS X 10.10 most of NSStatusItem has been deprecated in favour of the button property, which consists of an NSStatusBarButton. It should work like a norma

Answer 1

Swift 3 version of Manfred Urban's answer. Works on El Capitan.

extension NSStatusBarButton {

   public override func mouseDown(_ event: NSEvent) {

        if (event.modifierFlags.contains(NSControlKeyMask)) {
            self.rightMouseDown(event)
            return
        }

        self.highlight(true)

        (self.target as? TrivialTargetClass)?.togglePopover()
    }
}

Don't forget to set the buttons highlight property to false again if appropriate.