My Mac doesn't work with my Samsung TV but works fine with my other smaller 32 inch display with HDMI cable. It even doesn't show the option for airplay like the symbol for it.
MacBook Pro 13″, macOS 12.1
to get a Mac display to become active, you need the Mac to query the display, and the display to answer with its name and capabilities. Otherwise, the display will not be shown as present, and no data will be sent to the display. "No signal detected" is generated by the DISPLAY, not by the Mac.
This query is only sent at certain times:
• at startup
• at wake from sleep — so momentarily sleeping and waking your Mac may work
• at insertion of the Mac-end of the display-cable, provided everything on that cable is ready-to-go
• on invoking Option-(Detect Display) button in Displays preferences (from another display)
so try doing some of those things and see if the display comes alive.
Modern Displays with multiple ports are sometimes busy scanning the other ports, looking for an input, and miss the query from the Mac. They need to pay attention to the port you are actually using, or they will miss the query.
Some displays have On-Screen Display settings that can be used to tell the display a computer is attached on a certain port, or a certain port should be highest priority. Changing those may make your display more responsive.
Some displays include their own private "sleep" settings for the display alone. This can allow the display to enter its own sleep mode, on top of the Mac's not sending it data. A display that is sleeping on its own cannot respond to the Mac's query, and will stay dark.
to get a Mac display to become active, you need the Mac to query the display, and the display to answer with its name and capabilities. Otherwise, the display will not be shown as present, and no data will be sent to the display. "No signal detected" is generated by the DISPLAY, not by the Mac.
This query is only sent at certain times:
• at startup
• at wake from sleep — so momentarily sleeping and waking your Mac may work
• at insertion of the Mac-end of the display-cable, provided everything on that cable is ready-to-go
• on invoking Option-(Detect Display) button in Displays preferences (from another display)
so try doing some of those things and see if the display comes alive.
Modern Displays with multiple ports are sometimes busy scanning the other ports, looking for an input, and miss the query from the Mac. They need to pay attention to the port you are actually using, or they will miss the query.
Some displays have On-Screen Display settings that can be used to tell the display a computer is attached on a certain port, or a certain port should be highest priority. Changing those may make your display more responsive.
Some displays include their own private "sleep" settings for the display alone. This can allow the display to enter its own sleep mode, on top of the Mac's not sending it data. A display that is sleeping on its own cannot respond to the Mac's query, and will stay dark.
Hi dearbornumd,
It sounds like you're attempting to use your Samsung TV as a monitor for your Mac, is that correct?
If so, the M1 Macs can support 1 external display. If another display is currently connected when trying to connect the Samsung, that may explain why it won't connect.
If that is not the case, take a look over the tips under the "If your Mac doesn’t detect a connected display" section of the following article:
Take care.
dearbornumd,
Thanks for clarifying. If you have other HDMI inputs on your TV, does it recognize the Mac when using one of them?
Also, what is the model of the TV in question?
Cheers!
In this case, it is simple connection only between my Mac and Tv with HDMI cable, but the TV doesn't mirror or extend the display of my Mac.
So I have tried all the inputs on the TV, still no results.
The TV model is Samsung class 7 series 65''. When I try HDMI cable on my smaller TV 32 inch it works fine.
M1 Mac not responding to HDMI on bigger Samsung TV(65 inch)
