[✓] Flutter (Channel master, v1.9.8-pre.38, on Mac OS X 10.14.6 18G87, locale zh-Hans-CN) [!] Android toolchain - develop for Android devices (Android SDK version 28.0.3) ! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses [✗] 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 ✗ CocoaPods not installed. CocoaPods is used to retrieve the iOS and macOS platform side's plugin code that responds to your plugin usage on the Dart side. Without CocoaPods, plugins will not work on iOS or macOS. For more info, see https://flutter.dev/platform-plugins To install: sudo gem install cocoapods pod setup [!] Android Studio (version 3.4) ✗ Flutter plugin not installed; this adds Flutter specific functionality. ✗ Dart plugin not installed; this adds Dart specific functionality. [!] IntelliJ IDEA Ultimate Edition (version 2019.2) ✗ Flutter plugin not installed; this adds Flutter specific functionality. ✗ Dart plugin not installed; this adds Dart specific functionality. [!] VS Code (version 1.37.1) ✗ Flutter extension not installed; install from https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter [!] Connected device ! No devices available ! Doctor found issues in 6 categories.