To find out the start command for mysqld (using a mac) I can do:
ps aux|grep mysql
I get the following output, which allows me to start mys
sudo launchctl list | grep -i mysql
If the result shows anything like: "xxx.xxx.mysqlxxx"
sudo launchctl remove xxx.xxx.mysqlxxx
Example:
sudo launchctl remove org.macports.mysql56-server
sudo launchctl unload -wF /Library/LaunchDaemons/xxx.xxx.mysqlxxx.plist
Example:
sudo launchctl unload -wF /Library/LaunchDaemons/org.macports.mysql56-server.plist
Note: In some cases if you tried "a)" first, you need to reboot again before try b).