Mysql On Mac OS: Remove & Install
If you downloaded and installed from .dmg package already, and mightbe sometime it sucks because of some reason like me, i gem install mysql2.
1 Remove mysql from you Mac OS X
1.1 backup your database by mysqldump, of course if you want to.
1.2 stop the database. "sudo mysqladmin shutdown" or from the preference panel.
1.3 remove MySQL binary and configuration files
sudo rm /usr/local/mysql sudo rm -rf /usr/local/mysql*
1.4 If MySQL automatically at boot and the system preference panel,
sudo rm -rf /Library/StartupItems/MySQLCOM sudo rm -rf /Library/PreferencePanes/My* rm -rf ~/Library/PreferencePanes/My*
1.5 mac OS keeps track of installed applications by tracking "receipts".
sudo rm -rf /Library/Receipts/mysql* sudo rm -rf /Library/Receipts/MySQL*
Then look for receipts in a different location. Open up /Library/Receipts/InstallHistory.plist, find the entry for MySQL, delete the entry.
One more location: look in /private/var/db/receipts/ and search for mysql in the directory. There should be 2 files, delete them.
2 Install by Homebrew
brew install mysql
mkdir -p ~/Library/LaunchAgents
ln -sfv /usr/local/opt/mysql/*.plist ~/Library/LaunchAgents launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
mysql.server start
Then if mysql start successfully,
mysql_secure_installation
step by step.
PS: You might get this error:
“ERROR! The server quit without updating PID file”.
1
sudo chmod -R 755 /usr/local/var/mysql $ rm -Rf /usr/local/var/mysql/Your-Machine-Name.local.err
2
ps aux | grep mysql
Then "kill -9 xxxx" to kill all the progress.
3
mv /etc/my.cnf /etc/my.cnf.old
4
mv /var/lib/mysql/ib_logfile* /root/
May be other reasons, hope this helps.
http://nali.org/remove-mysql-from-mac-os-x-snow-leopord/
http://benjsicam.me/blog/how-to-install-mysql-on-mac-os-x-using-homebrew-tutorial/