Switcher Cast is a desktop tool for MAC that allows your computer screen to appear as a source in the Switcher Studio iOS app. With Switcher Cast installed, Switcher Studio can show anything that happens on your computer, whether it’s PowerPoint, Keynote, documents, websites, YouTube videos, etc. To get started, connect your computer to the same WiFi network as the other devices and launch the Mac screen-sharing app, SwitcherCast.