> sudo /usr/local/mysql/support-files/mysql.server stop
> sudo /usr/local/mysql/support-files/mysql.server start --skip-grant-tables
> /usr/local/mysql/bin/mysql
mysql > ALTER USER 'root@localhost' IDENTIFIED BY 'MyNewPass';
mysql > exit or Ctrl + Z
> sudo /usr/local/support-files/mysql.server stop
> sudo /usr/local/support-files/mysql.server start
> mysql -u root -p
> Enter the new password
Источник: https://m.youtube.com/watch?v=OEXPj8iYP3c