OK,
Maybe this is reviving a dead topic, but for those who want to skip over 8 pages of chat, this mobo still does work 100% (sound, network, sleep, graphics) at least as far as 10.6.8 with the following considerations;
Have a compatible video card (I've used a slowish Nvidia GT220, natively supported)
Have a compatible DVD drive for sleep to work (Sony OptiArc)
You use the attached DSDT file (it's the same one from several pages back, but reposted for those joining the thread late.
You use the following settings when using MultiBeast (current as of 3.8.0)
- UserDSDT
System Utilities (both checked)
Drivers/Audio/Realtek/AppleHDArollback
Drivers/Misc/FakeSMC
Bootloaders/Chimera
Customization/Boot Options/64-bit Apple Boot Screen
With different video cards, your mileage may vary, but the above works for me.
All credit to Sudds for the DSDT edits, and working with me months back on it.
Cheers.