I have a Tacx Vortex smart and an Imac. I was trying to use the fitbit dongle to pir it but it does not work. Any help?
Any USB 2.0 ANT+ dongle will work with Zwift. We recommend the Garmin mini that we sell in our own shop (shop.zwift.com) but Tacx also makes a killer dongle as well.
I do not believe the Fitbit dongle is USB 2.0 and we really have no experience with it.