2. Quad monitor support when using t...

Quad monitor support when using the USBC-6950M on an Apple system

Last Update: August 20th, 2026
Article ID: 2452317

Can I Use the USBC-6950M in a Four-Monitor Setup on an Apple Silicon Mac?

Yes, but there is an important distinction: the USBC-6950M adds two external displays using DisplayLink technology. Reaching a total of four external monitors depends on how many additional displays your specific Mac can support natively.

In other words, the USBC-6950M can be part of a four-monitor setup, but it does not turn every Mac into a four-external-display system by itself.

Summary

The Plugable USBC-6950M provides two HDMI outputs, each supporting up to 4K (3840 × 2160) at 60Hz on compatible displays.

Because the adapter uses DisplayLink technology, these two displays do not rely on the Mac's normal native external-display limit.

That makes the USBC-6950M especially useful on Apple silicon Macs, where native display support varies significantly between M1, M2, M3, M4, and M5 processors, and between Base, Pro, and Max versions of those processors.

For a four-external-monitor setup:

  • Two displays can be connected through the USBC-6950M.
  • The remaining two displays must be supported through the Mac's native display outputs, another DisplayLink solution, or another compatible display technology.
  • The exact configuration depends on the Mac model and processor.

This article uses "four monitors" to mean four external displays. The built-in MacBook display is not included in that count.

Applicable To

Plugable USBC-6950M USB-C to dual HDMI adapter with DisplayLink 4K support and integrated USB-C cable.

Plugable Dual Monitor USB-C to HDMI Adapter, 4K 60Hz USBC-6950M

Apple MacBook Air and MacBook Pro systems with:

  • M1, M1 Pro, M1 Max
  • M2, M2 Pro, M2 Max
  • M3, M3 Pro, M3 Max
  • M4, M4 Pro, M4 Max
  • M5, M5 Pro, M5 Max
  • macOS 11 or newer
  • DisplayLink Manager for macOS

Mac mini, iMac, and Mac Studio systems can also use the USBC-6950M, but their native display capabilities differ from MacBook systems. Check the specifications for your specific Mac before planning a four-monitor configuration.

Apple silicon Macs have specific limits on the number of displays they can drive natively.

Connecting a standard USB-C or Thunderbolt dock does not automatically increase that native limit.

The USBC-6950M works differently.

It uses DisplayLink, which combines software and hardware to send display data over a USB connection. This allows the USBC-6950M to provide two additional extended displays without depending on the Mac's normal native display-output limit.

That means a four-monitor setup can combine:

  • Two DisplayLink-connected HDMI monitors through one USBC-6950M
  • Four DisplayLink-connected HDMI monitors through two USBC-6950M
  • One or more displays connected through the Mac's native Thunderbolt or HDMI display outputs

The part that changes from one Mac to another is the number of native displays available for that second group.

Can My Mac Reach Four External Displays With One USBC-6950M?

The following table is intended as a practical planning guide for MacBook Air and MacBook Pro systems.

Apple Silicon Native Display Capability Relevant to This Setup Four External Displays Using One USBC-6950M?
Base M1 / M2 One native external display Not with the USBC-6950M alone. Two DisplayLink displays + one native display = three external displays.
M1 Pro / M2 Pro Up to two native external displays Yes. Two DisplayLink displays + two native displays can provide four external displays.
M1 Max / M2 Max Supports four native external displays on applicable MacBook Pro models Yes, although the USBC-6950M is not required simply to reach four displays.
Base M3 Up to two native external displays when supported MacBook models are used with the lid closed Yes, in the appropriate closed-lid configuration. With the laptop display active, native display support is more limited.
M3 Pro Up to two native external displays Yes. Two DisplayLink displays + two native displays can provide four external displays.
M3 Max Supports up to four native external displays on applicable MacBook Pro models Yes, although DisplayLink is not required simply to reach four displays.
Base M4 Up to two native external displays while the built-in display remains active on supported models Yes. Two DisplayLink displays + two native displays can provide four external displays.
M4 Pro Up to two native external displays Yes. Two DisplayLink displays + two native displays can provide four external displays.
M4 Max Supports up to four native external displays on applicable MacBook Pro models Yes, although DisplayLink is not required simply to reach four displays.
Base M5 Up to two native external displays while the built-in display remains active on supported models Yes. Two DisplayLink displays + two native displays can provide four external displays.
M5 Pro Supports up to three native external displays on applicable MacBook Pro models Yes.
M5 Max Supports up to four native external displays on applicable MacBook Pro models Yes, although DisplayLink is not required simply to reach four displays.

Apple's display limits depend on the exact Mac model, processor, resolution, refresh rate, and connection method. Always verify the specifications for the individual Mac before building the display configuration.

Example Configurations

Base M1 or M2 MacBook Air

This is where the distinction between "four screens" and "four external monitors" becomes important.

A base M1 or M2 MacBook Air supports one external display natively.

With one USBC-6950M:

  • HDMI 1 on the USBC-6950M = DisplayLink display
  • HDMI 2 on the USBC-6950M = DisplayLink display
  • One native display = third external display
  • Built-in MacBook display = fourth screen

This provides four total screens, but only three external monitors.

If you specifically need four external monitors on one of these systems, another compatible DisplayLink-based display solution would be required.

M1 Pro, M2 Pro, or M3 Pro MacBook Pro

These systems can support two native external displays.

A possible four-monitor configuration is:

  • External monitor 1 through HDMI 1 on the USBC-6950M
  • External monitor 2 through HDMI 2 on the USBC-6950M
  • External monitor 3 through a native Mac display connection
  • External monitor 4 through another supported native Mac display connection

This is a practical configuration for productivity applications such as office work, web browsing, messaging, email, and similar desktop workflows.

Base M3 MacBook Air or MacBook Pro

Base M3 MacBook systems can support two native external displays when used in Apple's supported closed-lid configuration.

That creates a possible path to four external displays:

  • Two displays through the USBC-6950M
  • Two native external displays
  • MacBook lid closed

If the MacBook's built-in display is active, the native display configuration changes, so do not assume that the same four-external-monitor setup will be available with the lid open.

M4 and M5 MacBook Systems

Display support improved significantly on newer Apple silicon systems.

Base M4 and M5 MacBook models can support up to two native external displays on supported configurations while continuing to use the built-in display.

When combined with the two DisplayLink outputs from the USBC-6950M, these systems can be used as part of a four-external-monitor setup without relying on the closed-lid behavior required by base M3 MacBooks.

Pro and Max versions may provide additional native display capability depending on the exact processor and Mac model.

Requirements

Before setting up multiple displays with the USBC-6950M, verify the following:

  • DisplayLink Manager is installed and running. Installation instructions here: https://kb.plugable.com/questions/1595423  
  • macOS has granted DisplayLink Manager the required Screen Recording permission.
  • The USBC-6950M is connected to a USB-C, USB4, or Thunderbolt port.
  • HDMI monitors are connected using HDMI-to-HDMI cables.
  • Each monitor and HDMI cable supports the resolution and refresh rate you intend to use.
  • Native displays are connected using ports and adapters supported by your specific Mac.
  • Your Mac's native display capability has been verified for its exact processor and model.

The Screen Recording permission is required because of how macOS allows DisplayLink Manager to create the additional displays. DisplayLink does not use this permission to store or record the contents of your screen.

Important Notes

Four 4K 60Hz Displays Does Not Mean Every Workload Will Perform the Same

A monitor displaying a 4K desktop at 60Hz is different from simultaneously playing four high-bitrate 4K 60Hz videos.

DisplayLink uses the host computer's CPU and GPU resources along with USB data bandwidth to create its displays. Performance can therefore vary depending on:

  • Mac model and processor
  • Number of displays
  • Display resolution and refresh rate
  • Applications being used
  • Amount of movement on screen
  • Other workloads running on the Mac
  • USB devices sharing system resources

For typical productivity workloads, DisplayLink is designed to provide additional desktop space. It should not be treated as a replacement for native GPU display outputs for gaming or other latency-sensitive, graphics-intensive workloads.

HDCP-Protected Content Is Not Supported Through DisplayLink

DisplayLink-connected displays do not support HDCP-protected video playback.

This can affect services and applications that use copy protection, including some content from streaming platforms.

If HDCP-protected playback is required, use a native display connection rather than a DisplayLink-connected monitor.

HDMI-to-HDMI Connections Are Required

The USBC-6950M's display outputs are HDMI.

Connect them directly to HDMI inputs on the monitors using HDMI-to-HDMI cables.

HDMI-to-USB-C monitor connections are not supported by this adapter.

Still Need Help?

Four-monitor setups can become complicated quickly because two computers with identical-looking USB-C ports can have very different display capabilities.

If you are unsure whether your Mac can support the configuration you have in mind, contact Plugable Support (support@plugable.com) with:

  • Your exact Mac model
  • Apple silicon processor
  • macOS version
  • Number of external monitors
  • Monitor resolutions and refresh rates

How each monitor will be connected

We will be happy to help you determine the configuration that makes sense before you start swapping cables and adapters.