Flutter安装后Dart版本显示1.24.3而非2.x的问题求助

Hey there! I’ve run into this exact issue before—let’s break down what’s happening and how to fix it.

Why the Version Mismatch? #

The problem boils down to two separate Dart installations on your system:

1. An old standalone Dart SDK located at /usr/local/bin/dart—this is the one your terminal is currently picking up
2. The Flutter-bundled Dart SDK that came with your Flutter upgrade (the 2.x version you see in flutter --version)

When you run dart --version, your shell uses the first dart executable it finds in your PATH environment variable. Right now, /usr/local/bin is listed before Flutter’s bin directory, so it’s grabbing the outdated version instead of Flutter’s newer one.

How to Fix It #

Follow these steps to prioritize Flutter’s Dart SDK:

1. Open your shell configuration file

   • For Zsh (default on newer macOS), edit ~/.zshrc
   • For Bash, edit ~/.bash_profile or ~/.bashrc

2. Adjust your PATH order
   Look for lines that set your PATH. Make sure the path to your Flutter bin directory comes before /usr/local/bin. For example, if Flutter is installed in your home folder:

   # Put Flutter's bin directory first
   export PATH="$HOME/flutter/bin:$PATH"
   # Then other system paths like /usr/local/bin
   export PATH="/usr/local/bin:$PATH"
   

3. Refresh your shell environment
   Run this command to apply the changes immediately (replace with your config file if needed):

   source ~/.zshrc
   

4. Verify the fix

   • Run where dart again—you should see Flutter’s Dart path listed first
   • Run dart --version; it should now match the Dart version shown in flutter --version

Alternative Option (If You Don’t Need Standalone Dart) #

If you don’t use the standalone Dart SDK for any other projects, you can simply delete the old executable:

rm /usr/local/bin/dart

This will force your shell to use Flutter’s bundled Dart by default.

内容的提问来源于stack exchange，提问作者Chris G.