MacBook Air M5 + CalDigit TS4: Can It Run Two 4K Monitors?
Yes. The documented capabilities of the M5 MacBook Air and CalDigit TS4 support two external 4K displays at 60 Hz through a native Thunderbolt display path.
Setup checked
What you need
- MacBook Air — M5
- CalDigit TS4
- Two external 4K monitors
- Display connections, cables, or adapters that support 4K at 60 Hz
- The TS4 connected directly to the MacBook Air through its upstream Thunderbolt connection
Products in this setup
CalDigit TS4
The dock used in this documented dual-4K setup.
View CalDigit TS4 at Newegg →Paid link — DeskCheck may earn a commission at no additional cost to you. Compatibility results are calculated independently.
Why this setup works
Apple documents support for up to two external displays on the M5 MacBook Air. Apple says two displays can run at up to 6K at 60 Hz or 4K at 144 Hz.
Apple also specifically documents support for up to two external displays over a single Thunderbolt port.
The 4K 60 Hz goal in this guide therefore falls within the MacBook Air's documented native external-display capability.
CalDigit's TS4 documentation separately lists dual 4K displays at 60 Hz as a supported configuration.
Do you need DisplayLink?
No.
This configuration uses the MacBook Air's native Thunderbolt display capability. DisplayLink Manager is not required simply to run two 4K 60 Hz monitors through this documented TS4 configuration.
This distinction matters because some multi-monitor Mac setups rely on DisplayLink software to work around native display limitations. The M5 MacBook Air does not need that workaround for this two-display goal.
How can the monitors be connected?
CalDigit documents several dual-monitor connection options for the TS4.
- One monitor through the TS4 DisplayPort connection and the second through a Thunderbolt port using a compatible USB-C video adapter.
- Two compatible displays connected through the TS4's Thunderbolt ports using USB-C video adapters.
- Two compatible USB-C or Thunderbolt displays connected directly to the Thunderbolt ports.
Your monitor inputs, cables, and adapters still need to support 4K at 60 Hz.
Will the TS4 charge the MacBook Air?
Yes. The CalDigit TS4 documents up to 98W of host charging through its upstream Thunderbolt connection.
That allows the TS4 to provide laptop power while also acting as the dock for the displays and other connected devices.
Important limitations
- This result applies specifically to two external displays at 4K 60 Hz.
- Higher refresh rates and other display combinations are not covered by this specific DeskCheck result.
- Monitors, cables, and adapters still need to support the requested resolution and refresh rate.
- The TS4 should be connected directly to the MacBook Air through its upstream Thunderbolt connection.
- PASS reflects documented compatibility. It does not guarantee against defective hardware, cable faults, firmware issues, or operating-system problems.
Sources
Apple documents support for two external displays and support for two displays over a single Thunderbolt port.
CalDigit documents dual 4K 60 Hz display support, monitor connection options, and 98W host charging.
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Related guides
DeskCheck evaluates documented pre-purchase compatibility. PASS means the documented capabilities support this configuration. It does not guarantee against defective cables, damaged hardware, firmware problems, or operating-system faults.
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