if [ -f /Library/LaunchDaemons/homebrew.mxcl.canna.plist ]
then
sudo launchctl unload -w /Library/LaunchDaemons/homebrew.mxcl.canna.plist
fi
if [ -f /Library/LaunchDaemons/homebrew.mxcl.canna.plist ]
then
sudo launchctl unload -w /Library/LaunchDaemons/homebrew.mxcl.canna.plist
fi