小编目前也米有发现比较好的卸载方式，只能删除mysql的相关目录。

 sudo rm /usr/local/mysql

 sudo rm -rf /usr/local/var/mysql

 sudo rm -rf /usr/local/mysql*

 sudo rm -rf /Library/StartupItems/MySQLCOM

 sudo rm -rf /Library/PreferencePanes/My*

 vim /etc/hostconfig and removed the line MYSQLCOM=-YES-rm -rf ~/Library/PreferencePanes/My*

 sudo rm -rf /Library/Receipts/mysql*

 sudo rm -rf /Library/Receipts/MySQL*

 sudo rm -rf /var/db/receipts/com.mysql.*