mac MySQL 卸载
sudo rm /usr/local/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.*
mac MySQL 修改密码
mysql -uroot -p
mysql>use mysql;
mysql>FLUSH PRIVILEGES;
mysql>ALTER user 'root'@'localhost' IDENTIFIED BY 'newpassward'
