1. Homebrew 切换源

https://lug.ustc.edu.cn/wiki/mirrors/help/brew.git

```shell script

2. 替换brew.git:

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

3. 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 ```