• I've read and understood the CONTRIBUTING guidelines and have done my best effort to follow.

Report

What did you do?

ℹ Please replace these two lines with what you did.
Searched for "cocoapods ruby version"

What did you expect to happen?

I would find a document that indicated that the current ruby version required to install CocoaPods was "x.y.z"

What happened instead?

ℹ Please replace these two lines with of what happened instead.

I found these instructions
https://guides.cocoapods.org/using/getting-started.html#getting-started

CocoaPods is built with Ruby and it will be installable with the default Ruby available on macOS. You can use a Ruby Version manager, however we recommend that you use the standard Ruby available on macOS unless you know what you're doing.

The previous statement is only true if you are on a recent version of MacOS. I am currently two versions back (Big Sur), but this was failing for me even last year when I was only one version back. It seems like a frequently asked question and adding some documentation on the lines of the following might be helpful.

"If you are on an older version of Mac OSX, your ruby version might be too old. CocoaPods requires a minimum of ruby-2.6. You should upgrade your version of OSX. If you cannot upgrade and know what you are doing, you can use a ruby version manager to install a more recent version".

If the maintainers are generally supportive of this change, I am happy to submit a PR.
This will hopefully reduce the incidence of issues similar to:
#11646 and
#11646