If you have an hdr enabled device such as a uhd blu ray player or streaming device connected to an hdr compatible tv it s possible that the tv is not recognizing the hdr encoded content.
Mac hdmi cable to tv not working.
Learn how to identify the ports on your mac.
Go to system preferences click display hold down the alt option k.
When you connect a display projector or hdtv using an hdmi cable you might see a difference in video quality if your display is set to television mode.
Having trouble with your hdmi port not detecting your monitors or tvs all of a sudden.
For example you can use a usb c to hdmi cable for some mac models.
Usb c or thunderbolt 3 usb c port.
This 2019 macbook pro catalina 10 15 2 works on a different tv using the same usb c to hdmi adapter.
Mac computers that have any of the following ports can connect to hdmi devices.
Connects directly to hdmi using an hdmi cable.
Learn how to identify the ports on your mac.
Check the documentation for your display to see if it includes built in controls.
Press and hold the option key on the keyboard and click on the speaker icon in the mac menu bar in the top right corner of your screen.
Connect one end of the video cable or an adapter if necessary to the computer s thunderbolt port hdmi port or dvi port then connect the other end of the cable to the tv s video input port.
Select default for display to automatically use the best.
Now test if this solved your problem.
From the drop down menu choose your hdmi connected tv.
So i know the adapter supports audio but it will not work on the tv in question.
Use a different port.
Connects to hdmi using a third party mini displayport to hdmi adaptor.
Connects to hdmi using an adapter such as the apple usb c digital av multiport adapter.
Use a different hdmi cable.
Try to use a different cable to connect your mac to your display if possible.
Displays not made by apple sometimes have brightness and color adjustments built into the display.
Select your tv as a sound output device.
If it didn t check the following method.
The windows laptop works on the tv in question using the same hdmi cable audio and video.
Connects directly to hdmi using an hdmi cable.
In the case that your hdmi cable is damaged replacing it with a new one should resolve the issue.
If you need to adjust the resolution on your tv choose apple menu system preferences click displays then click display.
Connects to hdmi using an adaptor such as the apple usb c digital av multiport adaptor.
Connects to hdmi using a third party mini displayport to hdmi.