切换为清华镜像

1.curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install >> brew_install

会生成brew_install文件

2.修改brew_install文件

BREW_REPO = "https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git".freeze

CORE_TAP_REPO = "https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git".freeze

3.安装brew_install

/usr/bin/ruby ./brew_install

4.不用等，直接新开命令行

cd /usr/local/Homebrew/Library/Taps/homebrew

git clone https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git

5.切换为清华镜像

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

6.brew update

终端会显示Already up-to-date。