1.下载Flutter,直接Get the Flutter SDK下载

https://flutter.dev/docs/get-started/install/macos

2.直接在.bash_profile文件添加如下：

export PATH={flutter路径}/bin:$PATH    (例子：/Users/dongyin/Library/flutter/bin:$PATH)
export PUB_HOSTED_URL=https://pub.flutter-io.cn 
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

3.刷新.bash_profile文件

source ~/.bash_profile

注：如果产生如下错误：

-bash: brew: command not found

解决方法：下载brew，等待下载…

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

查看安装版本:

brew --version

4.查看是否需要其他依赖项

flutter doctor

5.AndroidStudio 在plugins中搜索安装，dart和flutter

6.运行程序，开始第一个flutter