title: flutter doctor not finding cocoa pods
body: <p>I have an issue that tells me to install cocoapods using gem, but the <strong>flutter doctor</strong> couldn't find it.</p>
  <pre><code>    [✓] Flutter (Channel stable, 1.22.4, on macOS 11.0 20A2411 darwin-arm, locale en-IN)
      • Flutter version 1.22.4 at /Users/kirandhoundiyal/flutter
      • Framework revision 1aafb3a8b9 (3 weeks ago), 2020-11-13 09:59:28 -0800
      • Engine revision 2c956a31c0
      • Dart version 2.10.4
  
   
  [✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
      • Android SDK at /Volumes/apps/Android/sdk
      • Platform android-30, build-tools 30.0.2
      • ANDROID_HOME = /Volumes/apps/Android/sdk
      • ANDROID_SDK_ROOT = /Volumes/apps/Android/sdk
      • Java binary at: /Volumes/apps/Android
        Studio.app/Contents/jre/jdk/Contents/Home/bin/java
      • Java version OpenJDK Runtime Environment (build
        1.8.0_242-release-1644-b3-6915495)
      • All Android licenses accepted.
  
  [✗] Xcode - develop for iOS and macOS
      ✗ Xcode installation is incomplete; a full installation is necessary for iOS
        development.
        Download at: https://developer.apple.com/xcode/download/
        Or install Xcode via the App Store.
        Once installed, run:
          sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
          sudo xcodebuild -runFirstLaunch
      ✗ CocoaPods installed but not working.
          You appear to have CocoaPods installed but it is not working.
          This can happen if the version of Ruby that CocoaPods was installed with is
          different from the one being used to invoke it.
          This can usually be fixed by re-installing CocoaPods. For more info, see
          https://github.com/flutter/flutter/issues/14293.
        To re-install CocoaPods, run:
          sudo gem install cocoapods
  
  [!] Android Studio (version 4.1)
      • Android Studio at /Volumes/apps/Android Studio.app/Contents
      ✗ Flutter plugin not installed; this adds Flutter specific functionality.
      ✗ Dart plugin not installed; this adds Dart specific functionality.
      • Java version OpenJDK Runtime Environment (build
        1.8.0_242-release-1644-b3-6915495)
  
  [!] Connected device
      ! No devices available
  
  ! Doctor found issues in 3 categories.
  </code></pre>
  <p>Also <code>gem list pod</code> is giving an empty list but <code>sudo gem list pod</code> is giving this</p>
  <pre><code>    *** LOCAL GEMS ***
  
  cocoapods (1.10.0)
  cocoapods-core (1.10.0)
  cocoapods-deintegrate (1.0.4)
  cocoapods-downloader (1.4.0)
  cocoapods-plugins (1.0.0)
  cocoapods-search (1.0.0)
  cocoapods-trunk (1.5.0)
  cocoapods-try (1.2.0)
  </code></pre>
  <p>I am first time doing this stuff, need some help, what's wrong?</p>
  <p>EDIT: <code>ruby -v</code> gives this <code>ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin20]</code></p>
  <p><code>which ruby</code> gives this - <code>/usr/bin/ruby</code></p>