What if my macbook air macos 11.6.7 displays a black screen with support.apple.com/mac/startup?

If your Mac doesn't start up all the way - Apple Support

This screen?

"A globe with an exclamation point means that your Mac tried to start up from macOS Recovery over the internet, but couldn't. Learn what to do if your Mac can't start up from macOS Recovery."

JKhelpme wrote:

Above "support.apple.com/mac/startup" on the black screen is a white circle with a diagonal line through it. That doesn't show up in your link. What does it mean?

What it means is that you are supposed to type that URL in your browser:

support.apple.com/mac/startup

It will redirect to the link in neuroanatomist's post.