解决mysql安装后无法设置初始密码的问题，亲测有效

以下内容来自网络，非原创。

一、第一步：停止MySQL服务。 

可能在使用MySQLWorkBench之前，你就开启了MySQL服务，所以这里需要关闭MySQL服务。 
关闭MySQL服务的操作：  

苹果->系统偏好设置->最下边点MySQL 在弹出页面中 关闭mysql服务（点击stop mysql server） 

二、第二步：进入终端，指令重启MySQL服务。 
0、打开终端： 
1、输入指令1：（进入到mysql的bin目录下） 
输入：cd /usr/local/mysql/bin/ 
2、输入指令2： 
输入：sudo ./mysqld_safe --skip-grant-tables 
3、输入指令2，会提示输入密码：（Mac账户的root用户密码）

4、输入密码后：会出现一堆提示：

Logging to '/usr/local/mysql-5.7.18-macos10.12-x86_64/data/ShiXiongweideMacBook-Pro.local.err'.
2017-06-17T06:35:38.6NZ mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql-5.7.18-macos10.12-x86_64/data

• 1
• 2

5、然后会发现，MySQL会自动重启。

附：第二步步骤，我这边终端上指令代码，罗列如下：

ShiXiongweideMacBook-Pro:~ shixiongwei$ cd /usr/local/mysql/bin/
ShiXiongweideMacBook-Pro:bin shixiongwei$ sudo ./mysqld_safe --skip-grant-tables
Password:
Logging to '/usr/local/mysql-5.7.18-macos10.12-x86_64/data/ShiXiongweideMacBook-Pro.local.err'.
2017-06-17T06:35:38.6NZ mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql-5.7.18-macos10.12-x86_64/data

• 1
• 2
• 3
• 4
• 5
• 6

第三步：另外开一个终端，设置MySQL密码。

0、另外再开一个终端： 
1、输入指令1：（进入到mysql的bin目录下） 
输入：cd /usr/local/mysql/bin/ 
2、输入指令2： 
输入：./mysql 
3、进入到mysql命令状态下：（mysql>是mysql命令状态提示） 
输入：mysql> FLUSH PRIVILEGES; 
4、设置密码admin123 
输入：mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('admin123');

附：第三步步骤，我这边终端上指令代码，罗列如下：

ShiXiongweideMacBook-Pro:~ shixiongwei$ cd /usr/local/mysql/bin/
ShiXiongweideMacBook-Pro:bin shixiongwei$ ./mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 34
Server version: 5.7.18 MySQL Community Server (GPL)

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.01 sec)

mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('admin123');
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> 

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22

至此，MySQL初始密码就设置好了。