homebrew mysql service not starting
# stop and unload the launchdaemon
sudo launchctl unload -w /Library/LaunchDaemons/homebrew.mxcl.mysql.plist
# remove the lauchdaemon file
sudo rm -f /Library/LaunchDaemons/homebrew.mxcl.mysql.plist
sudo rm -f /tmp/mysql.sock /tmp/mysqlx.sock