Mac系统下，brew安装慢的主要有2个方面：
brew update 慢brew upgrade 慢
brew update 慢
主要是要解决 .github 慢，打开终端运行以下命令：
cd "$(brew --repo)"git remote set-url origin https://mirrors.tuna./git/homebrew/brew.git# 步骤二cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"git remote set-url origin https://mirrors.tuna./git/homebrew/homebrew-core.git#步骤三brew update
brew upgrade 慢
打开终端运行以下命令：
echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.tuna./homebrew-bottles'>> ~/.bash_profilesource ~/.bash_profile
