brew 是什么 ？

brew 源码：GitHub - Homebrew/brew: 🍺 The missing package manager for macOS (or Linux)

brew 官网：macOS（或 Linux）缺失的软件包的管理器 — Homebrew

brew安装

/bin/zsh -c "$(curl -fsSL https://gitee.com/cunkai/HomebrewCN/raw/master/Homebrew.sh)"

环境变量配置： 

echo 'export PATH="/opt/homebrew/bin:$PATH"' >> ~/.bash_profile 

source ~/.bash_profile

echo 'export PATH="/opt/homebrew/bin:$PATH"' >> ~/.zshrc   

source ~/.zshrc

效果图