How to use two monitors with M3 MacBook Air

The new MacBook Air with M3 processor supports two external monitors — when the lid is closed. Here’s what to expect when using Clamshell mode.

Apple’s Clamshell mode has existed for a very long time. In short, Clamshell Mode allows the user to connect an external display, and shut the lid. Depending on user choices, the main display will then generally be displayed on the external monitor.

On the M1 and M2 MacBook Air, you could only have one external display, regardless of the lid position. So, when you’d shut the lid, you’d get that internal display, mirrored, to the external with no option at all for a second external display.

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