Why is my audio not working?

If you cannot hear video, it may be due to an audio setting on your computer. Please review the relevant steps for your PC type and check to make sure that all appropriate settings have been enabled. If you continue to experience issues after following these steps.
1. Check the System Preferences
  • Open System Preferences and click Sound.
  • Click the Output tab and click on Internal Speakers. or Headphones (depending on what you are using)
  • Check that Mute next to Output Volume is not muted (there should be no tick in the checkbox).
  • Make sure that the Output Volume slider is moved to the right.
2. Check your Mac OS (you may need to upgrade)
  • Click on the Apple icon in the top left-hand corner of your Mac and select About This Mac
  • Check to make sure the macOS is up to date
  • If an upgrade is needed, follow the instructions outlined on Apple’s Support page
1. Run the Audio Troubleshooter
  • First check to see if your video isn't muted
  • Go to Windows 10 Settings
  • Update and Security
  • Troubleshoot
  • Playing Audio
2. Choose the Correct Audio Playback
  • Click on Start to access the Sound option
  • Open the appropriate result and click on the Playback tab
  • On your default device, right-click and select properties
  • On the Advanced tab, under default format, change the setting and hit the Test button
  • If it doesn’t work, change the setting and hit Test