So I have two DELL u2415 monitors connected to USC-C to Dual Display Port adapter. The problem is when I go to displays it shows both my u2415 monitors as one under arrangement and they are just mirroring each other. I think it could be because the adapter is plugged into only the 1 usb-c. Could it be that I need two adapters and for them to not share the same adapter?

Surely there is a way as the adapter was advertised saying it would work.

Anyone had any experiences with an issue like this?

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    The advertisement you have referred to only says that this works on Windows - not macOS. Which model of Mac are you using the adapter with? – jksoegaard Feb 20 '18 at 0:31
  • @jksoegaard I am using a Macbook Pro (2017 Model) with High Sierra – sharpCodes Feb 20 '18 at 6:08
  • Which of the mid-2017 models do you have? - The 13", the 13" with Touch Bar or the 15" with Touch Bar? – jksoegaard Feb 20 '18 at 9:15
  • @jksoegaard 15" with touch bar – sharpCodes Feb 20 '18 at 11:14

The adapter in question only supports Windows 10 - it won't work on a Mac.

Connecting two displays via one of the Thunderbolt 3 connectors on the MacBook Pro 15" with TouchBar is usually done via daisy-chaining through the display. This is only supported by Apple for Thunderbolt displays - not DisplayPort monitors.

The cheapest way to connect your monitors is to use two ports, as you mention. However it is not necessary buying two of those expensive dual-display adapters. Instead you can use a simple USB-C to DisplayPort cable. For example this one:


Buying two of these ($15.99) will allow connecting the two monitors to your Mac.

Hopefully you can return your adapter for a refund.

  • Thanks @jksoeagaard I'll give those cables a shot and let you know how it goes :) – sharpCodes Feb 20 '18 at 22:31
  • Waiting on new cables and reply from supplier of the initial adapter but weird that it is for a Mac but only supports windows 10...will post their reply here. – sharpCodes Feb 22 '18 at 2:29
  • It doesn’t say anywhere that it is for a Mac? – jksoegaard Feb 22 '18 at 7:12

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