gistfile1.txt

import Cocoa

class ViewController: NSViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        
        Firebase.defaultConfig().persistenceEnabled = true
        
        let ref = Firebase(url: "https://<YOUR_NAME_SPACE>.firebaseio.com/")
        ref.setValue("new-OSX") { (error, firebase) -> Void in
            print("call back")
        }
    }

    override var representedObject: AnyObject? {
        didSet {
        // Update the view, if already loaded.
        }
    }

}