找了半天

又是kill進程，又是改設置文件，又是重啟電腦，都不管用

翻到stackoverflow上的解決方案，實施成功：

原文鏈接：https://stackoverflow.com/questions/13480170/access-denied-for-mysql-error-1045

To restore it:

Stop mysqld deamons.

$ sudo service mysqld stop

Go to mysql/bin directory

$ cd /usr/bin

Start a mysql deamon with this option:

$ sudo mysqld_safe --skip-grant-tables
 

Open another terminal and open a mysql session to execute this:

$ mysql

mysql> use mysql;

see Note1 below for next line.
mysql> UPDATE user SET password=PASSWORD(‘YOUR_NEW_PASSWORD_HERE‘) WHERE user = ‘root‘;

mysql> exit;

Now kill the mysqld_safe process and restart mysqld normally:

$ sudo service mysqld start
 

Note1: password is the column name in table mysql.user prior to version 5.7. After which it became authentication_string. Change your update statement accordingly.

有坑請註意：

1. 第一句“sudo service mysqld stop” 我電腦提示service: command not found，但是不執行這句好像也沒什麽關系

2.Note部分，password關鍵詞在新版裏已修改為authentication_string

感恩作者。

mac mysql連接報錯ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)