I have been having fun with my new Yun, but its not showing up via USB on my Mac's (OSX 10.8.5 and 10.9). It does not show up as a keyboard also like the instructions say it might. My Uno R3 shows up no problem. I have been doing everything over the network to it since that is the only way it works. That is fine using ssh for the console but it would be nice to also use Serial with the Mac also so I don't have to change out all of the Serial connections to Console connections when testing older scripts.
I looked at the Mac System Information app and I don't see the Yun on the USB bus. Does the Yun need a special driver (I have the driver for the Uno R3 as FTTI drivers from other projects). Nothing on the getting started page said anything about that.