iMac Unable to Detect Cinema Display

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iMac Unable to Detect Cinema Display

I have new iMac 27-inch 5K with Retina display, running Mojave 10.14.2. I am trying to connect my old 23-inch Apple Cinema Display and bought the Mini DisplayPort to Dual-Link DVI Adapter, and a Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter to go from the Mini DisplayPort adapter to the iMac. From what I read previously on other threads, I though this would work. But it has not. I have tried:

Restarting
Rebooting
Using Option Detect in System Preferences > Displays

But the iMac is not detecting the Cinema display. Any suggestions are most welcome. Thank you.

iMac Line (2012 and Later)

Posted on Jan 6, 2019 11:23 AM

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Answer 1

Midlake Author

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Jan 6, 2019 11:26 AM in response to Midlake

I should add that the iMac is recognizing some aspect of the Cinema Display: When I hit the Cinema Display power button, the iMac asks if I want to shut the computer down. And peripherals show up when I connect them to the display's USB ports.

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Answer 2

Jan 6, 2019 5:05 PM in response to Midlake

The Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter doesn't work with Mini DisplayPort adapters.

You need a USB-C to MiniDisplayPort adapter, such as:

https://www.uptab.com/uptab-usb-c-type-c-to-mini-displayport-adapter-4k-60hz-silver/

(Many USB-C to Mini DisplayPort adapters don't support DVI adapters. The one I linked says it does support them.)

The power button and USB ports are working because they use the display's USB cable, not DVI.

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Answer 3

Midlake Author

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Jan 7, 2019 3:20 AM in response to Malcolm J. Rayfield

Thank you so much for taking the time to reply. This seems to be the solution I needed.

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iMac Unable to Detect Cinema Display

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