Update:
Have updated to 10.8.2. Used AppleACAPIPlatform.kext to prevent kernel panic. Re-enabled audio with Multibeast. Everything seemed fine.
Lately working on USB 3 issue; with the DSDT in this thread, rear ASMedia USB 3 still didn't work. So I tried TheLostSwede's USB 3 driver kexts (
http://www.tonymacx86.com/general-h...b-3-0-driver-3rd-part-controllers-10-8-x.html) even though he warned that they are not intended for Z77 boards.
They did enable USB 3 for the rear ASMedia ports, but they also borked sleep/wake (like it says in that thread): would immediately wake from sleep.
Tried to switch back by deleting those kexts and restoring the DSDT, but waking from sleep is still messed up. It goes to sleep fine, the LED blinks, and when I press a key or the power button it LOOKS like it wakes up (LED turns solid, HDD LED blinks) but the screen never wakes up. That makes me think it might have been due to the 10.8.2 update, not the USB kexts; no way to be sure at this point since I didn't test sleep/wake after 10.8.2.
I'll let you know what else I find.
-G