DOES IT FIT? / SETUP NOTES
Can this MacBook dock run two displays?
The chip, display technology, operating system and cables all affect the answer.
Count independent display streams, not just sockets. A native Thunderbolt dock carries the computer’s display outputs. A DisplayLink dock uses USB graphics software and introduces different permissions and workload limitations.
Two exact MacBook Air examples
| Host | Native external limit | TS4 native route | UD-6950PDH DisplayLink route |
|---|---|---|---|
| MacBook Air M1 (2020) | 1 | One vetted external screen | Up to two vetted 4K60 screens, conditional on software/permissions |
| MacBook Air 13-inch M4 (2025) | 2, including other native external connections | Up to two vetted 4K60 screens | Up to two vetted 4K60 screens, with the same DisplayLink limitations |
These rules do not automatically cover every MacBook, operating system, monitor timing or adapter. Closing an M4 Air’s lid does not add external-display capacity. An MST splitter is not assumed to create two independent extended macOS screens.
Example: two HDMI screens for office work
The current-revision Plugable UD-6950PDH is listed at $199.99 and includes its 130W supply and USB-C host cable. Two suitable HDMI display cables are also required. If already owned, the additional purchase subtotal can be the dock price. If not owned, their unverified cost must be added before calling the budget complete.
Use one HDMI or DisplayPort output from each of the dock’s two output groups. Four sockets do not mean four independent screens. The current revision uses the marked side host port, not the front peripheral USB-C port.
Example: native two-display route on M4 Air
TS4 is listed at $379.99 with its 230W supply and Thunderbolt host cable included. Two HDMI displays need suitable USB-C-to-HDMI video adapters on the downstream Thunderbolt ports plus HDMI cables. A two-DisplayPort route instead needs one DP cable and one USB-C-to-DP video cable. Those display parts are not included in the dock-only price.
TS4 delivers up to 98W to its host; 230W is the power brick rating. Plugable rates up to 100W to a compatible USB-C PD host. Actual negotiated power varies. Shared USB bandwidth, port allocation and exact peripheral requirements also matter.
Official sources
- air m1
- air m4 specs
- air m4 displays
- caldigit product
- caldigit manual
- caldigit mac compat
- ts4 bh price
- plugable product
- plugable revision
- plugable mac install
Checked 2026-10-01. Manufacturer documentation, not our hands-on testing.