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AKL1968 Author

Level 1

4 points

Dell Monitor not connecting

Trying to connect a Dell 34" 4K Monitor to a 2019 MacBook Pro 13" Updated Last version Catalina using a Thunderbolt 3 to Thunderbolt 2 adapter. The Mac doesn't recognise the monitor.

MacBook Pro 13”, macOS 10.15

Posted on Apr 20, 2020 6:21 AM

Top-ranking reply

Grant Bennet-Alder

Level 10

132,583 points

Posted on Apr 20, 2020 7:00 AM

That is not a ThunderBolt-2 display, so the ThunderBolt-3 <--> ThunderBolt-2 adapter is the wrong adapter. That adapter only passes Thunderbolt Display signals ONLY -- you need [full size] DisplayPort or Mini DisplayPort.

Apple recommends this exceptional adapter/cable, rated for up to 5120 by 2880:

Moshi USB-C to DisplayPort Cable -- $49.95

Moshi USB-C to DisplayPort Cable - Apple

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Dell Monitor not connecting

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