The second-generation model is compact and has a short HDMI cable built in. When you're away from home, Chromecast lets you shed some of the bulk you'd get with an Apple TV. How to extend your Mac's desktop with a Chromecast and AirParrot 2 When you're finished with the TV, click the AirPlay icon and choose Turn AirPlay Off. If the screen edge over which the pointer moves between the screens is disorienting, go to the Displays preferences pane, click the Arrangement tab and drag the blue rectangles to positions that reflect the screens' physical layout. If your TV shows a replica of your Mac's display, click the icon again and choose Use As Separate Display.
