MacアプリでiOSアプリみたいにURL Scheme起動すんのってどうやんの？を調べてみた ref: http://qiita.com/toshi0383/items/94abad5667f84b773ba9

AppDelegate.swift

  func applicationDidFinishLaunching(aNotification: NSNotification) {
    // Insert code here to initialize your application
    var appleEventManager:NSAppleEventManager = NSAppleEventManager.sharedAppleEventManager()
    appleEventManager.setEventHandler(self, andSelector: "handleGetURLEvent:replyEvent:", forEventClass: AEEventClass(kInternetEventClass), andEventID: AEEventID(kAEGetURL))
    var appUrl = NSBundle.mainBundle().bundleURL.URLByAppendingPathComponent("", isDirectory: true)
    var a:Boolean = 0 // true
    var status = LSRegisterURL(appUrl as CFURL!, a)
  }

  func handleGetURLEvent(event: NSAppleEventDescriptor?, replyEvent: NSAppleEventDescriptor?) {
    println("yay");
  }