切换到国内源

## 替换brew.git:
 cd "$(brew --repo)"
## 中国科大:
 git remote set-url origin https://mirrors.ustc.edu.cn/brew.git
## 清华大学:
 git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git

## 替换homebrew-core.git:
 cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
## 中国科大:
 git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git
## 清华大学:
 git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git

## 替换homebrew-bottles:
## 中国科大:
 echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles' >> ~/.bash_profile
 source ~/.bash_profile
## 清华大学:
 echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.tuna.tsinghua.edu.cn/homebrew-bottles' >> ~/.bash_profile
 source ~/.bash_profile

## 应用生效:
 brew update

切换到官方源

## 重置brew.git:
 cd "$(brew --repo)"
 git remote set-url origin https://github.com/Homebrew/brew.git

## 重置homebrew-core.git:
 cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
 git remote set-url origin https://github.com/Homebrew/homebrew-core.git