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Mac OS Sierra not detecting 27" LED Cinema Display

I'm using OS Sierra 10.12.3 on my MacBook Pro (Late 2016) SN:C0*******TFM. The problem i'm facing is that as soon as upgrading my MacOS, it has stopped detecting my 27"-LED Cinema display SN:2A0*****6JL I'm using thunderbolt to USB-C port connector that was working prior to OS

Upgrade. Tried changing the connector as well, LED is fine and connector is fine when connected with some other machine. Also the ports are fine when connected to any other device. The problem is it doesn't detect the display at all. Please support!


<Personal Information Edited by Host>
Hello Nomiy,

Thanks for using Apple Support Communities.

I see that after upgrading your macOS, it stopped detecting your Apple Cinema Display. I'm happy to assist you with this.

I suggest taking a look at article: Get help with your Apple Cinema Display, specifically:
 

No image on the screen

  • Make sure the computer is turned on.
  • Make sure the power cord is plugged in properly.
  • Make sure the display cables are connected to your computer properly.
  • Make sure the DVI or Mini DisplayPort display cable is connected securely.
  • Make sure your computer is not in sleep mode.
  • Make sure the brightness is set properly. The brightness control is under the right front edge of the display.
  • Check for and install all available software updates. Software updates may provide solutions to many common issues.

If the display power cord is plugged into a grounded wall outlet or power strip, find out if power to the outlet has been interrupted. You can test the outlet by plugging in something that you know works, like a desk lamp or radio. 


Let me know if this helps or if you have any questions.

Have a great day!

Thanks Sterling for your response.

 

Once again duly checked the display and connectors and any peripheral. Everything is perfectly fine. I have tried connecting the same display to two other machines running MAC OS El Capitan and MAC OS Yosemite and its working  alright.

 

Also any other plugged in device in the MAC Book running OS Sierra is working fine. Its only the display that is not being detected on OS Sierra. Tried holding command key in Display Preferences to detect displays and still no result.

 

Any idea how can i repair this in OS Sierra or how soon Apple can release an upgrade to remove this bug?

Greetings Nomiy,

Thanks for trying those steps.

Since you are still having an issue, we would like you to contact Apple Support.

You can contact Apple Support here: Contact Apple Support

Best Regards. 

Thanks Jeremy. I have tried almost everything and it all comes to the short coming in MAC OS Sierra. Can't find any display drivers from trusted resource and the OS is totally not responding to my external display.

 

Apple support also not available for my region, nor any certified Service provider, any ideas how may i contact them?

Hey,


Seems a problem of firmware, Sierra gave you a new thunderbolt firmware during install ( thunderbolt 1.2 )
You should ask to apple wich version of firmware works with LED Cinema Display 27".

 

+++

I have the same problem !

Updated to Sierra 10.12.6, my Cinema Display is not recognized :-((

I've searched through different forums but couldn't find the solution.

Help!

 

thanks

最後更新：2017-08-22 23:34:50

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