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

Anton's solution is perfect. Here it is in Swift 3:

NSEvent.addLocalMonitorForEvents(matching: .leftMouseDown) { [weak self] event in
    if event.window == self?.statusItem.button?.window {
        // Your action:
        self?.togglePopover(self?.statusItem.button)
        return nil
    }

    return event
}

I added an observer for NSApplicationWillResignActive to close the popover and set the button's isHighlighted to false.