参考https://www.jianshu.com/p/12e885cb6e33
brew uninstall mysql@5.7
rm -rf /usr/local/var/mysql
rm /usr/local/etc/my.cnf
brew install mysql@5.7 // 安装
brew link --force mysql@5.7 // 链接 brew services start mysql@5.7 // 启动服务 echo 'export PATH="/usr/local/opt/[email protected]/bin:$PATH"' >> ~/.zshrc // 输出到环境变量 mysql_secure_installation
登入： mysql -uroot -p