there is no miroing to tv with hdmi cable

You can't mirror to it unless/until it is recognized, and 'recognized' may be the crux of the problem.

The Mac uses a system that reminds me of “Plug and play” to determine what display is connected, and what its capabilities are.

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

• hold the Option key while you click on the (Detect Display) button that will appear in Displays preferences (from another display)

so try doing some of those things and see if the display comes alive.

it does not need to have Apple play -- that is a completely different method of data transfer AND is invoked differently.

if you get no picture of any description, then it is not recognized as present, and no amount fiddling can make it work unless/until it display a picture of any description.

what it needs is the ability to answer back on the secondary data channel, and tell the Mac is name and its capabilities. it is possible that you are suing an older cable that does not carry the secondary data channel. if you decide to buy a new cable be sure your get a certifed "Premium" cable.

reynaldobal Said:

"I have tried even with another macbook and I can't mirror the mac in the TV.: The problem seems to be that the TV is not detected, I hold the option key and click Detect displays and/or hold command key and F1 and nothing happens, TV is an old Panasonic and is set in HDMI, maybe because it has not apple play."

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Getting the Video:

A. Settings on the TV, Itself:

Going into the settings of your TV, are there any settings for source of "input"?

B. Is there a Monitor Even Seen?

To Find Out:

1. Go to: Apple menu
2. Hold Down: the option key
3. Select: System Information
4. View: Hardware on the left-column
5. Click: Graphics/Displays
6. Confirm if a Second Screen is Even Seen. If not, then it is just need seen, nor detected. If so, then you have yet to mirror this.

reynaldobal Said:

"there is no miroing to tv with hdmi cable: i am trying to mirror my macbook pro 2012 with a hdmi cable to a tv but there is no image nor sound, I tried another tv with same results"

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Mirror the Screen to this External Display:

Performing the following will mirror the Home Screen, and allow you to use it as if it were you laptop's screen.

• Without Touchbar: Hold Down [command + F1]
• With Touchbar: Hold Down: [command + dull screen]

reynaldobal Said:

"there is no miroing to tv with hdmi cable: I checked all settings for HDMI in the old Panasonic for VCR, DVD, CABLE, DBS, PVR, GAME and AUX, and tried them all with the cable and adapter but no luck.

I can connect my mac to the apple tv I have wireless with a sony TV without problem, sadly the Panasonic is the one I wanted to use.”

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See if anything here helps: Use your TV as a display with Mac - Apple Support

reynaldobal wrote:

As I mentioned before in the Mac system information Mirror is off (second screen) and I was asking how to turn it Yes, but I had no answer.

Thank you

You can not turn on Mirror displays Unless/Until a second display is seen as present and working on your Mac.

MacOS 'Mirroring not selectable' is a SYMPTOM that the second display not being detected -- it is not the CAUSE of the problem.

reynaldobal Said:

"there is no miroing to tv with hdmi cable: […]As mentioned above I have tried Holding Down: command and F1, but I dont know [command + dull screen]??[…]”

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Dull Screen Button:

“dull screen” is the second-button-in from the far-left on Touch Bar. (“Dull” as in “decrease screen brightness”). But, if you have no Touch Bar, then it would NOT apply to you here. So, if you can’t mirror it, then it is a problem with the monitor’s settings.

reynaldobal Said:

"there is no miroing to tv with hdmi cable: Hi, I tried holding the command and F1 keys but nothing happened, I dont know about the other option with touch bar and dull screen. I tried moving several options in system preferences without luck.“

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Which Cable to Get:

Well, it needs to be a 4k monitor connected with a 4K HDMI cable. If you have no HDMI port, then this is the adapter to use: USB-C Digital AV Multiport Adapter - Apple. Having a female USB-C port, you won’t lose the charging port you need, and you’ll have a female USB port for a laptop cooler or a flash drive. Learn more on how to connect a monitor: Connect a Display to your Mac - Apple Support

reynaldobal Said:

"Well my macbook pro only has a mini display port so a bought an adapter to HMDI which I have been trying to use."

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Mini Display Ports do not Transit Sound:

Computer monitors are typically viewed at a closer distance (being they are often used for video output, and not so often for audio), while televisions (and many projectors) have audio and video (being they are often viewed from a distance, where audio is highly-needed). So, being a TV having no audio, that may be what is getting in the way here.