Test for touchBar... (no idea if it works)

touchBar.swift

@available(OSX 10.12.2, *)
extension ViewController: NSTouchBarDelegate {
    override func makeTouchBar() -> NSTouchBar? {
        let touchBar = NSTouchBar()
        // return touchBar info
        print(touchBar) // if nothing returns no touchBar available?
        return touchBar
    }
}

class AppDelegate: NSObject, NSApplicationDelegate {
    
    @IBOutlet weak var window: NSWindow!
    
    func applicationDidFinishLaunching(aNotification: NSNotification) {
        if #available(OSX 10.12.2, *) {
            ViewController().makeTouchBar()
        } else {
            // Fallback on earlier versions
        }
    }
}