I'm having a similar issue…Spektrum DX6 on Mac OS X Yosemite, connected with the USB to 3.5mm…but I cannot get my sticks to move any of the circles during the calibration.
Have you got a heli selected on the DX6? That helped me out slightly. Still looking for that last yaw input control!
Same here I even have it in heli mode and I followed all the tips and tricks and no conflicting drivers or spp. Still have nothing