I am having trouble with using an external display with my MacBook Air (2020, M1/Silicon). I have a variety of USB3 to HDMI adapters, but none work. The display shows up in the menu when set up 'mirroring', but does not display the screen. I would really like to use it as a second monitor rather than mirroring. Advice would be great.
Thanks!
MacBook Air 13″, macOS 10.15
What adapter(s) are you using? There is no need for the adapter to provide power. If your display has HDMI, you can use Apple's Multiport Adapter, but you can also use a simple USB-C to HDMI cable like this one (Amazon link).
Thank you for responding. I have the exact USB-C to HDMI cable. I am not sure why, but I tried a different monitor (the third one I tried) and now it works!
You need a USB-C adapter with an HDMI connector and a 100W PD pass through. That gives it enough power.
Apple menu -> System Preferences -> Displays will let you configure extended desktop. Make sure the Mirror displays checkbox is unchecked.
How do I get a second monitor or projector to work with my (M1) MacBook Air?
