Tried with power cord connected but still doesn't work. Thunderbolt to HDMI video adapter with audio support. Display Detected, but not Rendering from 2021 M1 Macbook Air. Luckily there is a cheap and simple solution that will allow you to display your MacBook Air screen on any HDTV with an HDMI port.
An important point to note - MacBook will not display anything to monitor in case it's not connected, by MagSafe adapter, directly to a power. However, when I connect the MacBook Air to the HDMI cable with a HDMI-to-Thunderbolt adapter, the projected image is 16:9, and thus is stretched and letterboxed at the top and bottom. And then connect USB 3.0 to HDMI / USB 3.0 to Display Port adapter to the second monitor by following the above method. When I connect my MBA M1 to my Epson 485W projector via HDMI using the (not-so-cheap) Apple USB-C Digital AV Multiport Adapter, I'm experiencing this: If playback doesn't begin shortly, try restarting your device. Dual display not supported on Apple M1 Macs. Plug one end of the HDMI cable to your TV's HDMI port. It sounds like the adapter is broken or your Mac cannot recognize it.
MacBook Air supports only one external monitor. Does not support MacBook models with a single USB-C port. MacBook Air 13″, macOS 10.15 Posted on 10:59 PM Reply I have this question too (16) I have this question too Me too (16) Me too. Also I have my Amazon FireTv connected via hdmi with no issue.