报错：ERROR! The server quit without updating PID file (/usr/local/var/mysql/chenyuntekiMacBook-Air.local.pid).

在Mac上通过brew install mysql 安装了完mysql

执行mysql.server start

报错：ERROR! The server quit without updating PID file (/usr/local/var/mysql/chenyuntekiMacBook-Air.local.pid).

nano /usr/local/var/mysql/chenyuntekiMacBook-Air.local.err 

查看错误信息发现：The error means mysqld does not have the access rights to the directory 

猜测是文件权限的问题

执行：chmod -R 777 /usr/local/var/mysql/

问题解决！