I successfully used HDMI to play videos on my TV, but now it only plays sound. I tried the steps above but it still doesn't work.

Hello MGaz_83,

Thank you for using Apple Support Communities. It's our understanding that only audio plays when connecting your Mac to a TV using HDMI. It sounds like you've done a great job trying to get this resolved. We're here to help.

If you haven't already, make sure that your Mac has the latest software.

Update macOS on Mac

If the issue persists, restart your Mac and TV. Restarting is a simple step that can resolve many unexpected behaviors.

Log out, sleep, wake, restart, or shut down your Mac

Let us know the results. Does the issue occur with multiple apps? Please include any other troubleshooting steps that you may have tried.

Have a nice day!

MGaz_83,

Wonderful! We're glad you were able to get this issue resolved. We encourage you to continue to use Apple Support Communities for any technical issues that you may have going forward. We're all here to help.

Take care!