[ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.

环境：mysql(5.7.17) install for mac(10.11.13)

环境设置及启动数据库：

brew install mysql
echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.bash_profile
source ~/.profile
检查一下mysql的运行状态
$ ps -ef | grep mysql
检查mysql 版本号；
mysql --version
查看 mysqld服务启动时候，配置文件的读取顺序:
mysqld --verbose --help | grep -A 1 'Default options'
启动mysql：
$mysql.server start

Mac 关于Mysql的卸载：

如使用brew安装：brew uninstall mysql 或者 brew remove mysql

但是又有点怕某些东西没有卸载完全影响到下一次的安装（我第一次重装就是这样的）以下是完整一点的手动卸载：

sudo rm /usr/local/mysql
sudo rm -rf /usr/local/mysql*
sudo rm -rf /Library/StartupItems/MySQLCOM
sudo rm -rf /Library/PreferencePanes/My*
rm -rf ~/Library/PreferencePanes/My*
sudo rm -rf /Library/Receipts/mysql*
sudo rm -rf /Library/Receipts/MySQL*
sudo rm -rf /var/db/receipts/com.mysql.*
其实不同的安装方式有些东西的存储位置不一样，删除完检查一下一些问文件是否删除了，没有的话则删除掉：

/usr/local/Cellar 里的mysql文件
/usr/local/var 里的mysql文件
/tmp 里的mysql.sock, mysql.sock.lock, my.cnf文件
pid文件和err文件都在/usr/local/var/mysql里确保删除了
brew安装的安装包存储在/usr/local/Library/Cache/Homebrew也可以一并删除
执行brew cleanup

错误一：Error: The

brew link

step did not complete successfully

在brew执行install mysql之后会出现一系列的安装信息，出现一个Error，查看到了ERROR的内容：

Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink lib/libmysqlclient.20.dylib
/usr/local/lib is not writable.

You can try again using:
brew link mysql

~ brew link mysql
Linking /usr/local/Cellar/mysql/5.7.12...
Error: Could not symlink lib/libmysqlclient.20.dylib
/usr/local/lib is not writable. //这个文件夹不可写

sudo chown -R $(whoami) /usr/local/lib/

Password:

➜ ~ brew link mysql

Linking /usr/local/Cellar/mysql/5.7.12… 93 symlinks created

错误二：Can\’t open the mysql.plugin table.

ERROR! The server quit without updating PID file (/usr/local/var/mysql/xxxiMac.local.pid).
mysqld: Table 'mysql.plugin' doesn't exist
[ERROR] Can\'t open the mysql.plugin table. Please run mysql_upgrade to create it.

解决方法：
unset TMPDIR
mysql_install_db --verbose --user=mysql --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql

/etc/my.cnf 配置文件信息

[mysqld_safe]
log-error =  /usr/local/var/mysql/logs/error.log

[mysqld]
#basedir = /usr/local/Cellar/mysql/5.7.17
datadir = /usr/local/var/mysql
#skip-external-locking
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1
port = 3306
# server_id = .....

[client]
socket = /tmp/mysql.sock
# Query Caching
#query-cache-type = 1
#Default to InnoDB
#default-storage-engine=innodb

#sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

错误三：ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using password: YES)

$ mysql -uroot -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

解决方案及日志：

方案一：
jddeiMac:~ iosTest$ mysql.server stop
Shutting down MySQL
.. SUCCESS!
jddeiMac:~ iosTest$ mysql.server start --skip-grant-tables
Starting MySQL
. SUCCESS!
jddeiMac:~ iosTest$ mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.17 Homebrew

Copyright (c) 2000, 2016, 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.

方案二：
jddeiMac:tmp iosTest$ mysqld --skip-grant-tables &
[1] 18745
jddeiMac:tmp iosTest$ 2017-03-29T10:04:00.209544Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-03-29T10:04:00.209815Z 0 [Note] --secure-file-priv is set to NULL. Operations related to importing and exporting data are disabled
2017-03-29T10:04:00.209889Z 0 [Note] mysqld (mysqld 5.7.17) starting as process 18745 ...
2017-03-29T10:04:00.213448Z 0 [Warning] Setting lower_case_table_names=2 because file system for /usr/local/var/mysql/ is case insensitive
2017-03-29T10:04:00.215026Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
2017-03-29T10:04:00.215044Z 0 [Note] InnoDB: Uses event mutexes
2017-03-29T10:04:00.215050Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
2017-03-29T10:04:00.215055Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.3
2017-03-29T10:04:00.215428Z 0 [Note] InnoDB: Number of pools: 1
2017-03-29T10:04:00.215582Z 0 [Note] InnoDB: Using CPU crc32 instructions
2017-03-29T10:04:00.217017Z 0 [Note] InnoDB: Initializing buffer pool, total size = 128M, instances = 1, chunk size = 128M
2017-03-29T10:04:00.228108Z 0 [Note] InnoDB: Completed initialization of buffer pool
2017-03-29T10:04:00.243353Z 0 [Note] InnoDB: Highest supported file format is Barracuda.
2017-03-29T10:04:00.250459Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2017-03-29T10:04:00.250647Z 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2017-03-29T10:04:00.311281Z 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2017-03-29T10:04:00.312090Z 0 [Note] InnoDB: 96 redo rollback segment(s) found. 96 redo rollback segment(s) are active.
2017-03-29T10:04:00.312102Z 0 [Note] InnoDB: 32 non-redo rollback segment(s) are active.
2017-03-29T10:04:00.312465Z 0 [Note] InnoDB: Waiting for purge to start
2017-03-29T10:04:00.365854Z 0 [Note] InnoDB: 5.7.17 started; log sequence number 2538666
2017-03-29T10:04:00.366081Z 0 [Note] InnoDB: Loading buffer pool(s) from /usr/local/var/mysql/ib_buffer_pool
2017-03-29T10:04:00.366203Z 0 [Note] Plugin 'FEDERATED' is disabled.
2017-03-29T10:04:00.368106Z 0 [Note] InnoDB: Buffer pool(s) load completed at 170329 18:04:00
2017-03-29T10:04:00.372234Z 0 [Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them.
2017-03-29T10:04:00.372252Z 0 [Note] Skipping generation of SSL certificates as certificate files are present in data directory.
2017-03-29T10:04:00.373055Z 0 [Warning] CA certificate ca.pem is self signed.
2017-03-29T10:04:00.373110Z 0 [Note] Skipping generation of RSA key pair as key files are present in data directory.
2017-03-29T10:04:00.373221Z 0 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306
2017-03-29T10:04:00.374246Z 0 [Note]   - '127.0.0.1' resolves to '127.0.0.1';
2017-03-29T10:04:00.374322Z 0 [Note] Server socket created on IP: '127.0.0.1'.
2017-03-29T10:04:00.456012Z 0 [Note] Executing 'SELECT * FROM INFORMATION_SCHEMA.TABLES;' to get a list of tables using the deprecated partition engine. You may use the startup option '--disable-partition-engine-check' to skip this check.
2017-03-29T10:04:00.456054Z 0 [Note] Beginning of list of non-natively partitioned tables
2017-03-29T10:04:00.469011Z 0 [Note] End of list of non-natively partitioned tables
2017-03-29T10:04:00.469229Z 0 [Note] mysqld: ready for connections.
Version: '5.7.17'  socket: '/tmp/mysql.sock'  port: 3306  Homebre

错误四：Unknown column ‘password’ in ‘field list’

jddeiMac:tmp iosTest$ mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.17 Homebrew

Copyright (c) 2000, 2016, 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> UPDATE mysql.user SET password=PASSWORD('root') WHERE user='root';
ERROR 1054 (42S22): Unknown column 'password' in 'field list'

解决方法：

新安装的MySQL5.7，登录时提示密码错误，安装的时候并没有更改密码，后来通过免密码登录的方式更改密码，输入update mysql.user  set password=password('root') where user='root'时提示ERROR 1054 (42S22): Unknown column 'password' in 'field list'，原来是mysql数据库下已经没有password这个字段了，password字段改成了
authentication_string
所以更改语句替换为update MySQL.user set authentication_string=password('root') where user='root' ;即可

错误五：ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/tmp/mysql.sock’ (2)

iMac:~ iosTest$ mysql.server start

Starting MySQL

错误六：ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

mysql> SET PASSWORD = PASSWORD('new password');
Query OK, 0 rows affected, 1 warning (0.11 sec)

mysql> ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
Query OK, 0 rows affected (0.02 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.03 sec)
mysql> \q
Bye
jddeiMac:~ iosTest$ mysql -uroot -pxxxx
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.7.17 Homebrew

Copyright (c) 2000, 2016, 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> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| logs               |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.10 sec)

参考资料链接：

Mac Pro下卸载安装Mysql