CocoaPods could not find compatible versions for pod "GoogleDataTransport":

[slaniado]

This is my flutter doctor output

[✓] Flutter (Channel stable, 2.2.1, on macOS 11.4 20F71 darwin-x64, locale es-419)
• Flutter version 2.2.1 at /Users/slaniado/desarrollo/flutter
• Framework revision 02c026b03c (13 days ago), 2021-05-27 12:24:44 -0700
• Engine revision 0fdb562ac8
• Dart version 2.13.1

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
• Android SDK at /Users/slaniado/Library/Android/sdk
• Platform android-30, build-tools 29.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 12.5, Build version 12E262
• CocoaPods version 1.10.1

[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 3.6)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 45.1.1
• Dart plugin version 192.7761
• Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[✓] VS Code (version 1.56.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.23.0

[✓] Connected device (2 available)
• iPhone SE (2nd generation) (mobile) • F25E6952-6730-4C74-8AB8-713F1F4F5759 • ios • com.apple.CoreSimulator.SimRuntime.iOS-14-5
(simulator)
• Chrome (web) • chrome • web-javascript • Google Chrome 91.0.4472.77

• No issues found!

flutter run

return this Error:
CocoaPods's specs repository is too out-of-date to satisfy dependencies.

pod install

[!] CocoaPods could not find compatible versions for pod "GoogleDataTransport":
In snapshot (Podfile.lock):
GoogleDataTransport (= 9.0.1, ~> 9.0)

In Podfile:
firebase_core (from .symlinks/plugins/firebase_core/ios) was resolved to 1.2.1, which depends on
Firebase/CoreOnly (= 8.0.0) was resolved to 8.0.0, which depends on
FirebaseCore (= 8.0.0) was resolved to 8.0.0, which depends on
FirebaseCoreDiagnostics (> 8.0) was resolved to 8.1.0, which depends on
GoogleDataTransport (> 9.0)

google_ml_kit (from `.symlinks/plugins/google_ml_kit/ios`) was resolved to 0.6.0, which depends on
  GoogleMLKit/PoseDetectionAccurate was resolved to 0.64.0, which depends on
    GoogleMLKit/MLKitCore (= 0.64.0) was resolved to 0.64.0, which depends on
      MLKitCommon (~> 0.64.0) was resolved to 0.64.0, which depends on
        GoogleDataTransport (~> 7.0)

You have either:

• out-of-date source repos which you can update with pod repo update or with pod install --repo-update.
• changed the constraints of dependency GoogleDataTransport inside your development pod google_ml_kit.
  You should run pod update GoogleDataTransport to apply changes you've made.

I tried every single post to try to clean and reinstall the pods and the same outcome.

[fbernaly]

Thanks for reporting, this is a know issue mentioned in the README. Refer to this issue #27.