Mac install MySQL error error 1045 (28000): Access denied for.

After installation, mysql-h localhost-u root-p time error,
ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: YES)
First step: Delete the Ib_logfile0 and ib_logfile1 files under/usr/local/mysql/data/.
Step two: Stop the MySQL service in System Preferences
Step Three: cd/usr/local/mysql/bin/
Execution./mysqld_safe--skip-grant-tables &
(MySQL will restart automatically, and the status of MySQL will become running in System Preferences)
The fourth step executes./mysql
Enter command FLUSH privileges after carriage return;
After entering, enter the command ALTER USER ' root ' @ ' localhost ' identified by ' your new password ';

Ref: 79134904

Mac install MySQL error error 1045 (28000): Access denied for.