how to connect external monitor to 2023 Mac 24' with m3 chip. I am using a USB-c to HDMI connector to connect to a TV with HDMI. The adator works on a laptop so I know that's not the problem
[Re-Titled by Moderator]
iMac (M3, 2023)
Are you running the TV in extended desktop mode, where you can set its Displays Settings "resolution" without any regards to the resolution of the internal 24" 4.5K Retina screen?
If this is a UHD 4K TV, are the adapter and cable rated for UHD 4K? (A UHD 4K TV has four times as many pixels as a 1080p TV, and really old HDMI cables designed for 720p/1080p HDTVs may not be adequate for a UHD 4K set.)
Recent versions of macOS do not like to see display transmission errors, and will deliberately cut resolution or signal if they see any. If there is a long cable between the iMac and the TV, perhaps signal attenuation, or RF interference, are causing display transmission errors that might trigger the problem.
Or the signal is not compatible with your TV. Plug the monitor in and see if you can reduce the resolution/frame rate on the computer.
I have a security system that will only display on one TV in the house. All the others say no signal.
So what happens when you connect the TV?
You just plug in the cables and it should work.
The screen on the TV should show the Mac's screen does it not?
It shows no signal. I have attached another computer to same TV, using same cable and it has a signal.
it seems like the outputs of the computer are not functioning now when they previously did.
How do I connect an external monitor to a 2023 iMac using a USB-C to HDMI adapter?
