Use an external display with your MacBook Air
The USB-C ports on your MacBook Air support 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 a Thunderbolt 3 (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 a Thunderbolt 3 (USB-C) port on your MacBook Air.
Connect a USB-C display: Connect the display to a a Thunderbolt 3 (USB-C) port on your MacBook Air.
See MacBook Air accessories for details about adapters. 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.
Tip: If you have an HDTV connected to an Apple TV, you can 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.
Learn more. See the Apple Support article Use external monitors with your Mac for details about display preferences and more. To troubleshoot an issue, see Get help with video issues on external displays connected to your Mac.