Get NS RGB components at specific coordinates based on main display id

get-ns-rgb-components-at-coords.swift

    func getNSComponentsAt(x: Int, y: Int) -> NSColor {
        let screenID = NSScreen.main!.deviceDescription[NSDeviceDescriptionKey("NSScreenNumber")] as! UInt32
        let image: CGImage = CGDisplayCreateImage(CGDirectDisplayID(screenID), rect: CGRect(x: CGFloat(x), y: CGFloat(y), width: 1, height: 1))!
        let bitmap = NSBitmapImageRep(cgImage: image)
        let color = bitmap.colorAt(x: 0, y: 0)

        self.redComponent = (color?.redComponent)!
        self.greenComponent = (color?.greenComponent)!
        self.blueComponent = (color?.blueComponent)!
        
        return color!
    }