搜索了网上的该内容，都告诉如下方法：但是我用了C-shell，所以没有$(brew --repo)变量，实际上该变量就是指向目录：/usr/local/Homebrew。
git -C "$(brew --repo)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git git -C "$(brew --repo homebrew/core)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git git -C "$(brew --repo homebrew/cask)" remote set-url origin https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-cask.git brew update ———————————————— 版权声明：本文为CSDN博主「YD-10-NG」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。 原文链接：https://blog.csdn.net/sinat_38184748/article/details/99450330
git -C "$(brew --repo)" remote set-url origin https://github.com/Homebrew/brew.git git -C "$(brew --repo homebrew/core)" remote set-url origin https://github.com/Homebrew/homebrew-core.git git -C "$(brew --repo homebrew/cask)" remote set-url origin https://github.com/Homebrew/homebrew-cask.git brew update ———————————————— 版权声明：本文为CSDN博主「YD-10-NG」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。 原文链接：https://blog.csdn.net/sinat_38184748/article/details/99450330cp config config.old
所以具体过程改成了：
cd /usr/local/Homebrew/ git remote set-url origin https://mirrors.ustc.edu.cn/brew.git cd Library/Taps/homebrew/homebrew-core git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git cd ../homebrew-cask
git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-cask.git
vi ~/.cshrc ## add the following line
setenv HOMEBREW_BOTTLE_DOMAIN http://mirrors.ustc.edu.cn/homebrew-bottles
brew update
brew doctor # to check whether everything is OK. source ~/.cshrc
其实所有的配置文件在这些位置，名字是config：
/usr/local/Homebrew/.git /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core/.git /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask/.git
原文：https://www.cnblogs.com/xhliu73/p/12270984.html