問題：修改密碼./mysql/user.MYD' not found
Enter password:
mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
mysql>
mysql> flush privileges;
ERROR 29 (HY000): File './mysql/user.MYD' not found (Errcode: 2 - No such file or directory)
數據損壞，Mysql卸載干凈重裝
卸載MySQL
一.在系統偏好設置找到MySQL服務—>停止
二.打開終端
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*
sudo rm -rf /Library/Receipts/mysql*
sudo rm -rf /Library/Receipts/MySQL*
sudo rm -rf /var/db/receipts/com.mysql.*
三.一定要重啟電腦 否則重新安裝依舊有問題
四.重新安裝MySQL即可