User profile for user: DavidK628
DavidK628 Author
User level: Level 1
8 points

I am trying to connect a new (purchased 9/21) MacBook to an external Display monitor, Dell U2412Mb.

I am trying to connect a new (purchased 9/21) MacBook to an external Display monitor, Dell U2412Mb.

I am using a Thunderbolt 3 to Thunderbolt 2 adapter from Apple.

I amusing a standard Display port cable E342987 to connect to the Dell monitor.

The Dell monitor is not being detected by the Displays section of System Preferences.

This cable and monitor worked well on my previous MacBook from 2012.

Any suggestions?

Thanks. David

MacBook Pro 13″, macOS 10.13

Posted on Sep 25, 2021 1:45 PM

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User profile for user: Malcolm J. Rayfield
Malcolm J. Rayfield
User level: Level 7
23,095 points

Sep 25, 2021 9:48 PM in response to DavidK628

The Thunderbolt adapter can't be used with non-Thunderbolt displays.

Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - Apple

"This adapter does not support DisplayPort displays like the Apple LED Cinema Display or third-party DisplayPort and Mini DisplayPort displays."


You need a USB C to DisplayPort Cable, such as:

https://www.startech.com/audio-video-products/cdp2dpmm1mw

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I am trying to connect a new (purchased 9/21) MacBook to an external Display monitor, Dell U2412Mb.

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