删除MySql

brew uninstall mysql

brew cleanup

sudo rm /usr/local/mysql

sudo rm -rf /usr/local/mysql*

sudo rm -rf /Library/StartupItems/MySQLCOM

sudo rm -rf /Library/PreferencePanes/My*

sudo vim /etc/hostconfig （ps：需要删除其中的MYSQLCOM=-YES-）

sudo 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.*

安装brew

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

安装MySQL

brew install mysql

mysql.server start

mysql_secure_installation 

mysql -uroot -p

mysql> select host,user,plugin from mysql.user;

+-----------+------------------+-----------------------+

| host      | user            | plugin                |

+-----------+------------------+-----------------------+

| localhost | mysql.infoschema | caching_sha2_password |

| localhost | mysql.session    | caching_sha2_password |

| localhost | mysql.sys        | caching_sha2_password |

| localhost | root            | caching_sha2_password | |

+-----------+------------------+-----------------------+

4 rows in set (0.00 sec)

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root'; 

mysql> select host,user,plugin from mysql.user;

+-----------+------------------+-----------------------+

| host      | user            | plugin                |

+-----------+------------------+-----------------------+

| localhost | mysql.infoschema | caching_sha2_password |

| localhost | mysql.session    | caching_sha2_password |

| localhost | mysql.sys        | caching_sha2_password |

| localhost | root            | mysql_native_password |

+-----------+------------------+-----------------------+

4 rows in set (0.01 sec)

flush privileges;