Use an external display with your MacBook Air
The USB-C port on your MacBook Air supports video output. You can use an external display, a projector, or an HDTV with your MacBook Air.
Connect a VGA display or projector: Use a USB-C VGA Multiport Adapter to connect the display to the USB-C port on your MacBook Air.
Connect an HDMI display or HDTV: Use a USB-C Digital AV Multiport Adapter to connect the HDMI display or HDTV to the USB-C port on your MacBook Air.
Connect a USB-C display: Connect the display to the USB-C port on your MacBook Air.
Connect a Thunderbolt display: Use a Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter to connect the Thunderbolt display to a Thunderbolt 3 port on your MacBook Air.
Adapters and other accessories are sold separately. Visit apple.com, your local Apple Store, or other resellers for more information and availability. Review the documentation or check with the manufacturer to make sure you choose the right product.
If you have an HDTV connected to an Apple TV, you can also use AirPlay to mirror your MacBook Air screen on your TV screen in up to 1080p HD. See Use AirPlay on your Mac for details.