Send us your mac to us with your order.This is an important number because it is how our IPTV service will identify the set top box. Set “screen resolution” to 1280×720 or match to your TV.Click “portal settings” and change the portal URL that we will send in another email after order.Then click “STB model” and select the “mag 250” as emulator.Click “profiles” and click on the “test profile” to edit.Open the app and go to the “settings” by clicking settings icon top of the app.Download the “STBemu (free)” app from google play store here.