Ошибка Flutter macOS high Sierra

Я следую инструкции на сайте Flutter. Предупреждение врача флаттера находится ниже. Моя проблема, которую я не знаю, как преодолеть от этой ошибки, предупреждения и т.д.

Какая-нибудь помощь, пожалуйста?

/Users/niyazitoros/development/flutter/flutter/bin/flutter --no-color doctor

Doctor summary (to see all details, run flutter doctor -v):

[✓] Flutter (Channel beta, v0.2.3, on Mac OS X 10.13.4 17E199, locale tr-TR)

[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)

    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses

[!] iOS toolchain - develop for iOS devices (Xcode 9.3)

    ✗ Missing Xcode dependency: Python module "six".

      Install via 'pip install six' or 'sudo easy_install six'.

    ✗ CocoaPods installed but not initialized.

        CocoaPods is used to retrieve the iOS platform side's plugin code that responds to your plugin usage on the Dart side.

        Without resolving iOS dependencies with CocoaPods, plugins will not work on iOS.

        For more info, see https://flutter.io/platform-plugins

      To initialize CocoaPods, run:

        pod setup

      once to finalize CocoaPods' installation.

[✓] Android Studio (version 3.1)

[✓] IntelliJ IDEA Community Edition (version 2018.1)

[!] Connected devices

    ! No devices available



! Doctor found issues in 3 categories.

Process finished with exit code 0

После исправления пути флаттера доктор дает мне это предупреждение.

/Users/niyazitoros/development/flutter/bin/flutter --no-color doctor

Doctor summary (to see all details, run flutter doctor -v):

[✓] Flutter (Channel beta, v0.2.3, on Mac OS X 10.13.4 17E199, locale tr-TR)

[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)

    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses

[!] iOS toolchain - develop for iOS devices (Xcode 9.3)

    ✗ Missing Xcode dependency: Python module "six".

      Install via 'pip install six' or 'sudo easy_install six'.

[✓] Android Studio (version 3.1)

[✓] IntelliJ IDEA Community Edition (version 2018.1)

[!] Connected devices

    ! No devices available



! Doctor found issues in 3 categories.

Process finished with exit code 0