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Dell Thunderbolt Docks and Apple USB-C Hosts

Summary: A guide for providing guidance on using an Apple USB-C host (example: MacBook Pro) with the Dell Thunderbolt Docks (WD19TB, WD19TBS, WD22TB4, SD25TB4) explaining the limitations or issues you might encounter when using them together. ...

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Instructions

Table of Contents:

  1. Functionality
  2. Limitations
  3. Dual Monitor Setup
  4. Support

Functionality

The WD19TBS dock with v1.0.14.1 update (which includes NVM43 firmware) and the WD22TB4 dock with 00.00.07.01 update (which includes NVM36 firmware) and the SD25TB4. The known functionality provided by the dock when connected to an Apple USB-C host is outlined below.

 

Table 1. Apple USB Type-C dock functionality
Apple USB-C Host External Displays Port Functionality
MacBook Pro, MacBook Air w/
Thunderbolt 3 or 4 ports (USB-C)		 Up to Dual 4K@60Hz*
Up to Single 5K@60Hz		 Thunderbolt, USB and Ethernet
MacBook w/ USB-C port Up to Single 4K@60 Hz** USB and Ethernet
iPad Pro w/ USB-C port Up to Single 5K@60 Hz** USB and Ethernet***

 

*See the Dual Monitor Setup section below for more information about dual monitor connections through WD19TB, WD19TBS, WD22TB4, or SD25TB4.

**Connection to the monitor should happen through DisplayPort (DP), High-Definition Multi-Media (HDMI), or USB-C port on the dock, not through the Thunderbolt port.

***See Apple support pages for the list of USB connections or devices supported by iPad Pro.

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Limitations

Below are some known functionality limitations when using a WD19TB, WD19TBS, WD22TB4, or SD25TB4. Dock with Apple USB-C host computers. A comparison with Dell commercial laptops is shown to clearly bring out the limitations.

Table 2. WD19TB, WD19TBS, WD22TB4, or SD25TB4 dock functionality comparison when connected to a Dell Commercial Notebook vs. Apple USB-C Host
Functionality Dell Commercial Notebooks Apple USB-C Host
Multi-Stream Transport (MST) support for monitors Extended Desktop mode. Yes No (workaround required*)
The dock power button emulates the computer power button. Yes Yes
Dock cable LED Yes Yes
Power Delivery Up to 130 Watts Up to 96 Watts
Audio through 3.5 mm headset jack** Yes No
MAC address pass-through Yes No
Wake on Dock Yes No
Wake-on-LAN Yes No
Firmware update using the computers operating system (Firmware Update Utility) Yes No (Must be connected to a Dell Windows operating system computer).
Remote firmware update using DDMC Yes Yes

 

Dual external monitor support is not available on MacBooks with the M1 or M2 chip due to a limitation of the chip. (This limitation excludes M1Max and M1Pro processor versions)

** WD19TBS and WD22TB4 are not equipped with 3.5 mm audio connections.

On PD3 compliant systems

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Dual Monitor Setup

Use either of the ways that are shown in the figures below to connect two monitors in Extended Desktop. This limitation is due to a lack of support for Multi-Stream Transport in macOS.

Dual Monitor Setup-1
Figure 1. Dual Monitor Setup-1 with WD22TB4 dock that is connected to an Apple USB-C Host. Monitors are connected to the dock using a dual Thunderbolt connection.

Dual Monitor Setup-2
Figure 2. Dual Monitor Setup-2 with WD19TB/WD19TBS/WD22TB4/SD25TB4 dock that is connected to an Apple USB-C Host. Where the monitors are connected to the dock using Thunderbolt and DisplayPort, HDMI, or DisplayPort over USB Type-C connections.

  • One monitor must be first connected using the DisplayPort port (DP, HDMI, USB-C port) and the other monitor must be connected using the Thunderbolt port on the dock.
  • The displays are mirrored if both the monitors are connected using the DisplayPort on the dock (that is, DP and HDMI (or) DP and DP (or) DP and USB-C).

Dual Monitor Setup-3
Figure 3. Dual Monitor Setup-2 with WD19TB, WD19TBS, WD22TB4, or SD25TB4 dock that is connected to an Apple USB-C Host. The first monitor is connected to the dock using Thunderbolt and the second monitor is daisy-chained to the first.

*This setup uses daisy chaining with Thunderbolt monitors (Figure 3).

Note: USB Type-C cable or adapter connecting to the Thunderbolt port on the dock to the monitor is not included with the WD19TB and WD22TB4 dock.
Note: *Recommended: Dell Adapter USB Type-C to DisplayPort Dell part 470-ACFC (USA Weblink) or
Dell Adapter USB Type-C to HDMI Dell part 470-ABMZ (USA Weblink).

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Support

Dell Technical Support can troubleshoot when Dell docks are used with Dell computers but cannot troubleshoot when Dell docks are used with non-Dell computers. For non-Dell computer issues, contact the computer manufacturer. (For example: Here it is Apple.)

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Additional Information

Recommended Articles

Here are some recommended articles related to this topic that might be of interest to you.

Affected Products

Dell Pro Thunderbolt 4 Smart Dock SD25TB4, Dell Thunderbolt Dock - WD19TB, Dell Thunderbolt Dock – WD19TBS, Dell Thunderbolt Dock – WD22TB4
Article Properties
Article Number: 000124312
Article Type: How To
Last Modified: 15 May 2025
Version:  20
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