Summary of problems encountered in upgrading mysql under mac

First, close
the original process. Different systems have different closing methods. The
current Mac is 10.12, and the closing command is
sudo launchctl unload -w /Library/LaunchDaemons/com.oracle.oss.mysql.mysqld.plist
or Execute
mysql.server stop under /usr/local/mysql/support file/.

If the command is not completely shut down, then
ps -ef|grep mysqld
finds the corresponding process number, and directly kills the

authorized folder
chown -R mysql :mysql /usr/local/mysql/data
chmod -R 777 /usr/local/mysql/data
If you encounter The server quit without updating PID file, it is also a permission problem.

Start mysql
sudo ./support-files/mysql.server start

Encountered
2017-03-10T03:44:41.015267Z 0 [ERROR] InnoDB: Unable to lock ./ibdata1 error: 35 during startup
2017-03-10T03:44:41.015301Z 0 [Note] InnoDB: Check that you do not already have another mysqld process using the same InnoDB data or log files
, then the process should not be shut down, so please refer to the above method of shutting down

After the startup is successful, there is a problem with joining the login. You
can start it in the following ways, skip the login, and then change the password
sudo ./support-files/mysql.server start --skip-grant-tables

Remember to FLUSH PRIVILEGES after changing the password;