方法一 : 关闭每次调用brew时自动更新

vim ~/.bash_profile

# 新增一行
export HOMEBREW_NO_AUTO_UPDATE=true

方法二 : 替换Brew源

1. 替换brew.git:

cd "$(brew --repo)"
git remote set-url origin https://mirrors.ustc.edu.cn/brew.git

2. 替换homebrew-core.git:

cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git

3. 重置brew.git:

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

4. 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