DynDNS Snow Leopard Compatibility → I’m not sure if dynDNS will ever update their Mac client but there’s a solution. Simply type the following two codes into terminal (first one will ask for your password):
sudo chmod +s /usr/local/dyndns/DynDNSUpdaterService
sudo perl -pi -e 's:.*nohup: :' /Library/StartupItemsDynDNSUpdater/DynDNSUpdater