Hey,
Everything works with my Turnigy i6s so the set up is good, and you don't really need a USB dongle with Taranis radios because of the mini-USB port, it's automatically recognized as an HID device. It's detected by my Mac and works great with other software asking you which input controller you want to use (crrcsim for example). Freerider just doesn't seem to want to choose it, it's weird…