In the Chrome browser, click the Google Cast button, you will see the available Chromecast devices in your network as shown below.



Click the arrow icon in the right. The options will be shown as:


  • Cast current tab. This is the default. The Chromecast tab will be cast to Chromecast.
  • Cast entire screen (experimental). This will share the desktop screen, not just a Chromecast tab, to Chromecast.
  • Audio mode. This will only send audio output to Chromecast. The screen or Chrome tab will not be shared.


You can click “Cast entire screen (experimental)” to start the desktop screen sharing. 

Of course, before sharing the desktop screen with the Chromecast device, there is a warning message letting you know that Google cast wants to share the screen and audio output (with Chromecast). You must click “Yes” to approve the screen sharing.



Once the desktop screen is shared to Chromecast, Google cast will indicate the screen is being captured and played on the Chromecast device.



At the same time, a notification of “Google cast is sharing your screen” will be shown on your desktop.


Now, the desktop screen and audio is shared to the Chromecast. You should be able to enjoy the video or music on your TV.


To stop desktop screen sharing with Chromecast, you can simply click “Stop sharing” in the notification, or click “Stop casting” in Google cast extension window.