1.) If ProPresenter is open on the iMac, quit the application.
2.) In the toolbar of the iMac, click the icon with two rectangles and make sure “use as separate display” is selected.
3.) Power on the AV rack by using the button on the top right. Be sure to turn this switch off when finished:
4.) Locate the device in the rack labeled “Video Selector”. Press the “iMac” button.
5.) Turn on the TV by using the remote that looks like this. It should be in the drawer in the AV rack.
6) Finally, open ProPresenter on the iMac by choosing the orange icon in the toolbar.