Launch Terminal.
Enable
sudo -s launchctl load -w /System/Library/LaunchDaemons/ftp.plist
Disable
sudo -s launchctl unload -w /System/Library/LaunchDaemons/ftp.plist
Launch Terminal.
Enable
sudo -s launchctl load -w /System/Library/LaunchDaemons/ftp.plist
Disable
sudo -s launchctl unload -w /System/Library/LaunchDaemons/ftp.plist