Hey, thanks for the post! It really fixed the problem for the keyboard, and I've been using it without any issues recently. However, I just so happened to download the new OS update "El Capitan" (Version 10.11) and it apparently disabled both my keyboard as well as my Ethernet cable at the same time. I tried redoing the steps and apparently, I do not believe they are working perhaps due to the newer OS version? I was wondering if there were going to be solutions for future OS updates like this one which will allow Mac users to keep using their Poseidon Z's?