I have a CD, but this CD comes from Asia and CIG is not available there. So I'm blocked with no use of the Wifi function of my great 6D
I just did the process with the software that came from the CD and it worked.
Once the eos utility loads (the version from cd) go to web service settings, it updates some ceritifacte stuff, then you have to press the button on the bottom right. I forget what it's called, basically, you have to log into canon image gateway and then click the thingo to add new sharing thingos. Once you set up, say facebook and email, they'll appear on the right column of things. There should be an empty left column. Now you press each individual one on the right and then the move to the left button. The left column are the settings stored on the camera.
Then you can use it directly from wifi on the camera.
I think you always have to install from Disc the first time, cuz the online downloads from Canon are just updates.
Surely the 6D came with a CD. Does that not work? Why don't you contact Canon support? I have not had any such problem, but then I have a 5D3 and no WiFi...