MacBook Air second screen
Will an MacBook Air with M1 chip support a 4K screen through USB-C and a second at 1080 with a dongle and HDMI cable?
MacBook Air 13″, OS X 10.11
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Hi,
Officially only one external display is supported on M1 MacBook Air, you can connect external monitor via USB-4 to HDMI adapter or cable.
Use an external display with your MacBook Air - Apple Support
Connect a display to your Mac - Apple Support