解决方法：首先打开终端，输入命令“mysql -u root”；然后输入命令“UPDATE mysql.user SET authentication_string=PASSWORD('新密码') WHERE User='root';”。
mac 中登陆mysql忘记密码解决办法
1、打开终端，输入命令：cd /usr/local/mysql/bin
2、mysql -uroot -p，用这条命令登陆时报错信息：
报错：Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
3、打开终端输入：sudo mysqld_safe --skip-grant-tables
输出Password:
Logging to '/usr/local/mysql/data/localhost.err'.-10-10T03:21:40.6NZ mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data
4、打开一个新的终端，输入：mysql -u root ，会看到以下输出。Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 16Server version: 5.7.23 MySQL Community Server (GPL)
Copyright (c) 2000, , Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
5、终端输入 use mysql显示如下Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
6、修改密码：UPDATE mysql.user SET authentication_string=PASSWORD('你的密码') WHERE User='root';Query OK, 1 row affected, 1 warning (0.01 sec)
Rows matched: 1 Changed: 1 Warnings: 1
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