Thanks for all your help and excellent guides. Unfortunately, I just determined my e6410 doesn't support QE, and since CI alone has been discontinued for yosemite, I guess I'll give your Mavericks guide a try instead on my trusty ol' e6410 with intel hd graphics.
Thanks for your quick reply. Unfortunately, when I do sudo and drop the script I get this:
Last login: Sat Dec 13 11:33:54 on ttys000
Bruces-MacBook-Pro:~ bruce$ sudo/Volumes/E6410Y/Audio\ Update/AudioUpdate.sh
-bash: sudo/Volumes/E6410Y/Audio Update/AudioUpdate.sh: No such file or directory
Bruces-MacBook-Pro:~ bruce$