Mac 下使用brew install 报错: Error： Cowardly refusing to `sudo brew install'

// 将brew权限改为root  
chown root:wheel /usr/local/bin/brew  
// 用root权限操作urs文件夹  
sudo brew install wget

error

• Error: Could not create /usr/local/Cellar

 brew install wget

• Error: Cowardly refusing to sudo brew install

 sudo brew install wget

• Error: chown: /usr/local/bin/brew: Operation not permitted

chown root:wheel /usr/local/bin/brew 

success

sudo chown root:wheel /usr/local/bin/brew 
sudo brew install wget