Uninstall via HomeBrew

• $ brew uninstall mysql
• $ brew doctor
• $ brew prune
• $ brew cleanup

Manually remove mysql from macOS Sierra

Search if mysql is currently running in background:

• $ ps -ax | grep mysql
• stop and kill any MySQL processes

Remove following items:

• $ sudo rm /usr/local/mysql
• $ sudo rm -rf /usr/local/var/mysql
• $ sudo rm -rf /usr/local/mysql*
• $ sudo rm ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
• $ sudo rm -rf /Library/StartupItems/MySQLCOM
• $ sudo rm -rf /Library/PreferencePanes/My*

Unload launch control:

• $ launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
• edit $ /etc/hostconfig and remove the line MYSQLCOM=-YES-

Remove following items as well:

• $ rm -rf ~/Library/PreferencePanes/My*
• $ sudo rm -rf /Library/Receipts/mysql*
• $ sudo rm -rf /Library/Receipts/MySQL*
• $ sudo rm -rf /private/var/db/receipts/*mysql*

Now try to run

• $ mysql (it shouldn't work)

Install Mysql via Homebrew

• $ brew install mysql
• $ brew services start mysql
• $ ln -sfv /usr/local/opt/mysql/*.plist ~/Library/LaunchAgents
• $ launchctl load ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist

For Sequal Pro

To find the path of my.cnf

• $ brew list mysql

• $ cp /brew_path_of_mysql_my_cnf_file/my.cnf /etc/my.cnf

• i.e $ cp /usr/local/Cellar/mysql/8.0.12/.bottle/etc/my.cnf /etc/my.cnf

In my.cnf file

in section [mysqld] add line:

• default-authentication-plugin=mysql_native_password

Now go to terminal

• $ mysql -u root -p

Add password to secure local mysql server

• $ ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'YOUR_PASSWORD_HERE';

Give it all privileges:

• $ GRANT ALL PRIVILEGES ON * . * TO 'root'@'localhost';

Then to reload newly assigned permissions run:

• $ FLUSH PRIVILEGES;
• $ exit from mysql terminal and close and restart the terminal

Restart mysql server

• $ brew services restart mysql

REF: https://stackoverflow.com/questions/51179516/sequel-pro-and-mysql-connection-failed