About DELL U2421HE Ultra Sharp monitor

Hi everyone,

I own a Dell U2421HE ultrasharp monitor which seems to not working as a hub when connected via USB-C cable with my mac mini M1.

Does anyone has the same problem- and even better a solution- on that issue?

Posted on Apr 24, 2021 6:26 AM

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10 replies

Apr 24, 2021 8:55 AM in response to mat8aios

I looked at the specs for the monitor, and it appears it supports HDMI, which should allow it to connect easily to the Mac mini.


Only use USB-C if you want the monitor to double as a USB-C hub for other connections.

The monitor should have on screen controls to select HDMI as input.


Displayport is more expensive, and you'll need DIsplayport to Displayport cabling that fits the monitor.

Typically, people use that for high speed gaming.

Apr 24, 2021 7:35 AM in response to mat8aios

  • avoid the Dell’s USB-C port for video since it doesn’t work very well with the mini
  • connect the Dell’s USB-C port to the mini’s USB-A port using suitable USB-C to USB-A cable/adapter. Do not connect it to any of the mini’s Thunderbolt ports
  • use HDMI-HDMI for video using a certified HDMI cable, 5’ or shorter https://www.hdmi.org/spec/premiumcable

Good luck!

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About DELL U2421HE Ultra Sharp monitor

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