安装mysql，更新mac系统后，出现
Warning:The /usr/local/mysql/data directory is not owned by 'mysql' or '_mysql' user.
这个就是因为权限问题导至的，如果不想麻烦整理系统权限，可以试试简单粗爆的方法，用sudo 命令启动
1、启动mysql
sudo /usr/local/mysql/support-files/mysql.server start
2、停止mysql
sudo /usr/local/mysql/support-files/mysql.server stop
3、重启mysql
sudo /usr/local/mysql/support-files/mysql.server restart