公式手順で上手くいかん…結構な人が別アプローチで解決するの何?
$ flutter doctor の指摘「CocoaPods not installed.」を解消するの?|Homebrew|Mac|Xcode|iOS|Flutter
https://mascularseal.blogspot.com/2023/04/flutter-doctor-cocoapods-not.html
【flutter 環境構築】ERROR: Error installing cocoapods: There are no versions of cocoapods-downloader (>= 2.0) compatible with your Ruby & RubyGems. (中略)cocoapods-downloader requires Ruby version >= 2.7.4. The current ruby version is 2.6.10.210. って出てくる人へ!!