Homebrew安裝主要靠git倉庫，切換源實際上就是切換相關git repo的remote url.
具體做法：
- 找到
brew.git和homebrew-core.git的本地repo - 切換兩個repo的remote url
切換USTC源：https://lug.ustc.edu.cn/wiki/mirrors/help/brew.git
# 更換brew.git的源
cd "$(brew --repo)"
git remote set-url origin https://mirrors.ustc.edu.cn/brew.git
# 更換homebrew-core.git的源
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git
brew update
另外涮总，還需要更換Homebrew Bottle源，這個只要在shell配置文件里加上（或更改）一個變量即可因宇。
如zsh就是編輯~/.zshrc文件, bash就是~/.bash_profile文件：
export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles
切換清華源：https://mirror.tuna.tsinghua.edu.cn/help/homebrew/
cd "$(brew --repo)"
git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-science"
git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-science.git
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-python"
git remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-python.git
brew update
重置官方源：
# 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
