Macbook Pro M3 Pro can't extend display on 2 extra monitors and Macbook's display.

I want to use my Macbook Pro with 3 different displays:

  • Laptop's display
  • Samsung external monitor
  • Samsung external monitor


But the kind of display that I'm getting is one display on the laptop, and in the external displays I get the extended screen but mirrored in both of the external displays. As if I had two displays in total, but both of my external monitors worked as the second display. In simple terms, I see the same thing in both of my external displays.


What I see in settings is that I have the Built-in display (normal) and a secondary display, where the screen is extending. It is not showing any third display as it should be.


I have both of these external monitors connected to a USB-C hub through HDMI, I have the UGREEN Revodok Pro 210. I use this also for my job's laptop for the same purpose.


I've seen some similar cases in the community where the problems were:

  • The Macbook Air doesn't support 2 external monitors. Not my case because I have a Macbook Pro.
  • The USB-C Hub doesn't support 2 external monitors. Not my case because I use the same hub for my job's laptop (DELL) and it works perfectly. I made sure that the hub supported my 2 external monitors.


I can't seem to find the answer. How do I make my Macbook Pro recognize both of my external monitors as separate monitors, so that I can have the 3 displays that I want, and not 1 normal and 2 mirroring each other?

MacBook Pro 14″, macOS 14.4

Posted on Sep 9, 2024 3:58 PM

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5 replies

Sep 9, 2024 5:23 PM in response to IvanMtt

You could look at the ones from Other World Computing (MacSales), SonnetTech, and CalDigit. All are long-time vendors of Thunderbolt gear for Macs.


Note that this might only be a convenient way to go if your work laptop also supports Thunderbolt 3 or Thunderbolt 4. A Thunderbolt dock will want the computer to which it is attached to support Thunderbolt output.

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Macbook Pro M3 Pro can't extend display on 2 extra monitors and Macbook's display.

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