Best Docking Station for MacBook Air M4 & M5 ~ Plugable Technologies

TL;DR

With the lid open, the M4 and M5 MacBook Air will drive two external monitors via the TBT4-UDZ while keeping the internal display active.
Closing the lid does not unlock support for a third external monitor. The native hardware limit for the base M4 and M5 chips is two external displays.
A standard USB-C hub uses only a fraction of the laptop's available bandwidth. A Thunderbolt 4 dock utilizes the full 40Gbps bandwidth.
The TBT4-UDZ is fully compatible with both the M4 and M5 — no firmware updates or software drivers are required.
To connect three or more external monitors, you need a DisplayLink-driven dock like the UD-ULTC4K.

Introduction

The MacBook Air M4 and M5 are exceptional laptops, boasting pro-level performance and an upgraded display architecture that finally allows two external monitors while the laptop remains open. However, to build a true desktop workstation, the ultra-thin Air still requires a connectivity hub. For anyone who needs to run two external screens, an Ethernet connection, extra USB ports, and fast charging — all from one cable — a Thunderbolt 4 dock is the definitive answer. This guide covers exactly what MacBook Air M4 and M5 users need to complete their desk setup and why the TBT4-UDZ is the recommended docking station.

What the MacBook Air M4 and M5 Are Missing

While the M4 and M5 chips deliver incredible processing power, the physical chassis remains minimalist. Here is what is missing out of the box:

Video outputs: 0 built-in (display only via Thunderbolt port)
Max external displays: 2 (supported with the lid open or closed)
USB-A ports: 0
SD card slot: 0
Ethernet: 0
HDMI or DisplayPort: 0

One cable connected to a premium Thunderbolt 4 dock instantly restores all of this missing functionality.

Why Thunderbolt 4 — Not Just USB-C

When shopping for a dock, it is critical to understand the difference between Thunderbolt and standard USB-C:

The MacBook Air M4 and M5 feature two Thunderbolt 4 ports, which also carry USB4 and USB-C signals.
A standard USB-C hub uses only a fraction of the laptop's available bandwidth, often bottlenecking display resolution or transfer speeds.
A Thunderbolt 4 dock utilizes the full 40Gbps bandwidth. This enables dual 4K displays, lightning-fast data transfers, and up to 100W charging simultaneously, without any performance degradation.
For MacBook Air users who want dual 4K monitors alongside a full suite of peripheral ports, Thunderbolt 4 is the only protocol that delivers everything at once.

TBT4-UDZ — What It Adds to Your MacBook Air

The Plugable TBT4-UDZ transforms your MacBook Air into a powerhouse desktop PC alternative. Rather than a list of specs, here is what it practically adds to your workflow:

Up to Dual 4K 60Hz monitors natively: Connect two displays via a flexible mix of 2x DisplayPort 1.4 and 2x HDMI 2.0 ports.
100W charging (98W certified): More than enough power to keep the MacBook Air fully charged while working under heavy loads.
6x USB-A ports: Connect legacy peripherals, external drives, and accessories your Air cannot natively support.
Front-facing 10Gbps USB-A: Fast data access without reaching around to the back of the dock.
Rear-facing 10Gbps USB-C: Great for dedicated external storage like an SSD or external hard drive.
Up to 2.5Gbps Ethernet: A stable, wired connection critical for reliable video calls and large file transfers.
SD/MicroSD card readers: High-speed access for photographers and content creators.
Total connectivity: 16 ports added to your MacBook Air from a single Thunderbolt 4 cable.

Plugable TBT4-UDZ Dual Display Docking Station for M4 Macs and Windows with 100W host charging and 4K support.

Recommended for MacBook Air M4 and M5

For the MacBook Air M4 and M5, the TBT4-UDZ is the cleanest, single-cable solution to unlock your dual-monitor setup, a full port suite, and reliable 100W charging.

View the TBT4-UDZ

Setting Up Dual Monitors with MacBook Air M4/M5

Setting up your extended workspace is a simple plug-and-play process:

Connect the TBT4-UDZ to your MacBook Air using the included Thunderbolt 4 cable.
Connect the power adapter to the dock (the dock will immediately begin charging the Air).
Connect Monitor 1 to the dock's DisplayPort or HDMI output in “Group 1”.
Connect Monitor 2 to the dock's second DisplayPort or HDMI output in “Group 2”.
Open System Settings → Displays on your Mac to arrange the virtual screens to match your physical desk layout.

Ergonomic Choice: Unlike older MacBook Air models that required closing the laptop (clamshell mode) to use two external screens, the M4 and M5 chips natively support this setup. You can leave the lid open for a three-screen setup, or close it to save desk space.

Can I Use the TBT4-UDZ with the Lid Open?

Yes. With the lid open, the M4 and M5 MacBook Air will drive two external monitors via the TBT4-UDZ while keeping the internal display active. This yields a highly productive three-screen total workspace.

Note that closing the lid does not unlock support for a third external monitor. The native hardware limit for the base M4 and M5 chips is two external displays, regardless of the laptop's physical lid position.

MacBook Air M4 vs M5 — Any Difference for Docking?

When choosing a docking station, the experience between the two chip generations is identical:

Both the M4 and M5 Air share the same Thunderbolt 4 port configuration.
Both support the same external display architecture (two external displays natively, regardless of lid position).
The TBT4-UDZ is fully compatible with both — no firmware updates or software drivers are required.
If you are buying a dock today, the TBT4-UDZ will remain fully compatible through future upgrades with any Mac featuring Thunderbolt or USB4.

Alternatives — When the TBT4-UDZ Isn't the Right Fit

While the TBT4-UDZ is the premier choice, different setups have different requirements:

Need more power: The TBT4-UDZ easily covers the MacBook Air's power draw. However, if you share the dock with a 16-inch MacBook Pro under sustained heavy load, you may want to use Apple's 140W MagSafe charger alongside the dock.
Shopping on a strict budget: If you are under $100, a USB-C hub will add ports but won't support dual displays on a Mac. If you need dual monitors on a budget, the UD-6950Z is a more affordable alternative utilizing DisplayLink technology.
Need 3+ external displays: The TBT4-UDZ maximizes the Mac's native limit of two external screens. To bypass Apple's limit and connect three or more external monitors, you need a DisplayLink-driven dock like the UD-ULTC4K.

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よくある質問

Can the MacBook Air M4 or M5 run two external monitors?

Yes. With the lid open, the M4 and M5 MacBook Air will drive two external monitors via the TBT4-UDZ while keeping the internal display active. The native hardware limit for the base M4 and M5 chips is two external displays, regardless of the laptop's physical lid position.

Do I need a Thunderbolt dock or a USB-C hub for my MacBook Air?

A standard USB-C hub uses only a fraction of the laptop's available bandwidth, often bottlenecking display resolution or transfer speeds. For MacBook Air users who want dual 4K monitors alongside a full suite of peripheral ports, Thunderbolt 4 is the only protocol that delivers everything at once.

Does closing the lid let the MacBook Air use a third monitor?

No. Closing the lid does not unlock support for a third external monitor. The native hardware limit for the base M4 and M5 chips is two external displays, regardless of the laptop's physical lid position.

Is there a difference between the M4 and M5 MacBook Air for docking?

When choosing a docking station, the experience between the two chip generations is identical. Both the M4 and M5 Air share the same Thunderbolt 4 port configuration, and the TBT4-UDZ is fully compatible with both — no firmware updates or software drivers are required.

How do I connect three monitors to a MacBook Air?

The TBT4-UDZ maximizes the Mac's native limit of two external screens. To bypass Apple's limit and connect three or more external monitors, you need a DisplayLink-driven dock like the UD-ULTC4K.

Apple, Mac, MacBook, MacBook Air, MacBook Pro, MagSafe and macOS are trademarks of Apple Inc. Thunderbolt is a trademark of Intel Corporation or its subsidiaries. USB4 and USB Type-C are trademarks of USB Implementers Forum (USB-IF). DisplayLink is a trademark of Synaptics Incorporated. HDMI is a trademark of HDMI Licensing Administrator, Inc. DisplayPort is a trademark of the Video Electronics Standards Association (VESA). All other trademarks are the property of their respective owners.