mac安装mysql后，启动mysql ERROR 2002 (HY000)错误解决办法

安装mac版的mysql后，启动mysql 报错：

ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)

google了一下发现很多人遇到，解决方法都各不相同，于是去查了下安装包中的readme，里面说的很清楚了：

After the installation, you can start up MySQL by running the following
commands in a terminal window. You must have administrator privileges
to perform this task.


If you have installed the Startup Item, use this command:


     shell> sudo /Library/StartupItems/MySQLCOM/MySQLCOM start
     (ENTER YOUR PASSWORD, IF NECESSARY)
     (PRESS CONTROL-D OR ENTER "EXIT" TO EXIT THE SHELL)


If you don't use the Startup Item, enter the following command sequence:


     shell> cd /usr/local/mysql
     shell> sudo ./bin/mysqld_safe
     (ENTER YOUR PASSWORD, IF NECESSARY)
     (PRESS CONTROL-Z)
     shell> bg
     (PRESS CONTROL-D OR ENTER "EXIT" TO EXIT THE SHELL)


You should be able to connect to the MySQL server, for example, by
running `/usr/local/mysql/bin/mysql'.

完成上面的命令后，启动mysql成功