I bought a new M1 MacBook and was super excited to use it. My monitor has a USB-C input. The MacBook comes with a USB-C cable. Awesome.
Plug everything up. Not so awesome.
The monitor could not be used as an external display for the MacBook. I called Apple Support, who were super nice but not helpful in the least. They had me reboot the computer, connect and disconnect, etc but nothing worked.
Finally, I found an obscure thread on the Internet saying that it was the cable.
The cable? Could it be?
Yes. I bought this cable and it worked right away. The USB-C cable that comes with this super-sophisticated MacBook doesn’t work for external displays.