3 Things to Know About Two External Monitors on a MacBook Air

Only M2 and M3 MacBook Airs can drive two external displays The M1 MacBook Air is stuck at one external monitor with no workaround.

Two external monitors only work in clamshell mode You must close the lid and use an external keyboard and mouse. Open the lid and it drops to one external plus the built-in display.

This is by design, not a bug Apple built the chip this way due to thermal and bandwidth limits. For two externals with the laptop screen open, you need a DisplayLink adapter.