brew安装nvm

1. brew install nvm
2. 创建nvm目录

   mkdir ~/.nvm

3. 将nvm添加到path。在用户名根目录下：

   vim .zshrc

按i进入编辑模式
第三行输入：

  export NVM_DIR="$HOME/.nvm"
  [ -s "/usr/local/opt/nvm/nvm.sh" ] && \. "/usr/local/opt/nvm/nvm.sh"  # This loads nvm
  [ -s "/usr/local/opt/nvm/etc/bash_completion.d/nvm" ] && \. 
  "/usr/local/opt/nvm/etc/bash_completion.d/nvm"  # This loads nvm bash_completion

按esc键，输入:wq，保存退出。

1. 重新加载文件

   source .zshrc

done.