1. sudo rm -rf /usr/local/mysql  
2. sudo rm -rf /usr/local/mysql*  
3. sudo rm -rf /Library/StartupItems/MySQLCOM  
4. sudo rm -rf /Library/PreferencePanes/My*  
5. sudo nano /etc/hostconfig     (复制前面部分回车，然后删掉这一行: MYSQLCOM=-YES-，control+O回车保存，control+X退出编辑界面)  
6. sudo rm -rf ~/Library/PreferencePanes/My*  
7. sudo rm -rf /Library/Receipts/mysql*  
8. sudo rm -rf /Library/Receipts/MySQL*  
9. sudo rm -rf /var/db/receipts/com.mysql.* 

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ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

SET PASSWORD = PASSWORD('123456'); 

 

创建用户 

mysql> insert into mysql.user(Host,User,authentication_string) values("localhost","phplamp",password("1234")); 

分配权限 

grant all privileges on *.* to 'user'@'localhost' with grant option 

grant all privileges on *.* to 'user'@'localhost' identified by '123456′; 

grant all privileges on *.* to 'user'@'%' identified by '123456';

刷新系统权限表 

mysql>flush privileges;