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Level 1

14 points

Apple HD Cinema Display 30

OK, I am enountering a very odd problem.

I have a 30" Cinema HD Display that connects to a Mac via an Apple Dual DVI adapter which has Thunderbolt 2 and USB. (It needs both connections.)

1) This display functions perfectly with a 2015 MacBook Pro. (No adapters needed).

2) This display functions perfectly with a 2018 Mac mini, using an Apple Thunderbolt C - Thunderbolt 2 adapter. USB connects directly to the computer.

3) To Connect to the MacBook Pro 2021, in addition to an Apple Thunderbolt C - Thunderbolt 2 adapter for video, it also needs a USB-C to USB A adapter, which I am using an Apple Branded one. However, the 2021 MacBook Pro, in the Display preferences, I can not see an 2nd monitor and doesn't show Arrangement tabs.

Any suggestions?

Posted on Dec 18, 2021 1:08 PM

Best reply

Grant Bennet-Alder

Level 10

128,089 points

Posted on Dec 18, 2021 2:51 PM

The Apple Dual-Link DVI adapter features a Mini DisplayPort (not ThunderBolt) input. The adapter requires a source of 5 Volt power on its USB port, to run its internal electronics. The display does not require a "live" USB-A connection unless you want to have the brightness slider in the Mac's Displays control panel or use the USB Hub in the displays. An iPad charger will suffice to provide that USB 5 Volt power.

For your 2018 Mac mini setup, I do not understand how that is working. Apple's ThunderBolt-3 <-> ThunderBolt-2 adapter claims to support ONLY Thunderbolt displays.

_________

If you were to ask me in isolation how to hook this up, I would tell you it requires a USB-C to Mini DisplayPort adapter for video, the Apple Dual-Link DVI adapter you were using, and a source of 5 Volt power to run the Dual-Link DVI adapter.

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Apple HD Cinema Display 30

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