The extension's real name is "Steinberg SKI Remote", should be the second entry normally when you add a new device by clicking on + in Device setup.
Have you previously installed Bonjour? Please check this first.
Are you using the Wifi network broadcasted by your router or a direct ad-hoc connection with your mac?
Armand Rochette, Software Engineer - Mobile Team
Steinberg Media Technologies GmbH
Check out Steinberg on YouTube, Twitter and Facebook!