Imac connectivity issues

Hi,
New to Zwift today. Have downloaded all apps and paired iphone to imac but cannot seem to use mac as a monitor. I can hear audio to suggest companion app is paired properly but my avatar is stationary and when pedalling the app is registering movement but not the imac screen. The pairing to trainer (Tacx Satori) is fine through the app but not to the imac - is there a simple step I’m missing? Driving me mad! Any help appreciated!!

You don’t need to use the Zwift Companion App to bridge the Bluetooth signal to a Mac, you can do it directly. You need to make sure the trainer is not connected to any other device or app before opening Zwift on the Mac

A better option is using an Ant+ dongle and a USB extension.

Thanks - will give that a try…