# axin @ AxindeMacBook-Pro in /usr/local/flutter on git:stable x [17:02:04] C:141 $ flutter upgrade
死也不动，查看当前分支
flutter channel # axin @ AxindeMacBook-Pro in /usr/local/flutter on git:stable x [17:07:06] C:1 $ flutter channel Flutter channels: beta dev master * stable
没毛病，开FQ(科学上网) try again
# axin @ AxindeMacBook-Pro in /usr/local/flutter on git:stable x [17:05:12] C:141 $ flutter upgrade Your flutter checkout has local changes that would be erased by upgrading. If you want to keep these changes, it is recommended that you stash them via "git stash" or else commit the changes to a local branch. If it is okay to remove local changes, then re-run this command with --force.
说我本地有改动，试试强制升级
flutter upgrade --force
再试试
flutter upgrade --force Upgrading Flutter from /usr/local/flutter... fatal: unable to access 'https://github.com/flutter/flutter.git/': LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to github.com:443
Running flutter doctor... Doctor summary (to see all details, run flutter doctor -v): [✓] Flutter (Channel stable, 2.2.3, on Mac OS X 10.14.5 18F203 darwin-x64, locale zh-Hans-CN) [✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2) [✗] 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 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 see https://guides.cocoapods.org/using/getting-started.html#installation for instructions. [✓] Chrome - develop for the web [✓] Android Studio (version 4.2) [✓] IntelliJ IDEA Ultimate Edition (version 2020.2.1) [✓] VS Code (version 1.57.1) [✓] Connected device (1 available)
! Doctor found issues in 1 category.
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