GX620 onboard Audio
April 27, 2008
1. Install OSX 
2. open terminal
3. type:
sudo su <enter>
4. enter password <enter>
5. type:
cd /System/Library/Extensions/AppleAC97Audio.kext/Contents/PlugIns/ <enter>
6. type:
nano AppleAC97AudioIntelICH.kext/Contents/Info.plist <enter>
7. look for a part of the file where:
<key>ICH6 AC97 Audio</key>
{
<Key>IOProbeScore</key>
<string>0x266e8086</string>
}
8. and change <string>0×266e8086</string> into <string>0×27de8086 0×266e8086</string> (thus add 0×27de8086 to the line)
9. type: <ctrl>-x to exit and say yes when it asks you to save the change
10. after exit back to prompt type:
kextload AppleAC97AudioIntelICH.kext <enter>
you should get somthing like
kextload: AppleAC97AudioIntelICH.kext loaded successfully
11. check for the sound it should work now…
12. back to the terminal prompt type:
rm /System/Library/Extensions.kextcache <enter>
13. type:
kextcache -k /System/Library/Extensions <enter>
14. reboot!!!
15. enjoy the sound (sound is fully operational, inputs/outputs/mic in the front and the back are working)
Update by B
The update posted by Mc works perfectly! One minor point though, the following lines:
<Key>IOProbeScore</key> <string>0x266e8086</string>
do not have to be in this order. Since the only thing to be edited is <string>0×266e8086</string> just search for this string in the <key>ICH6 AC97 Audio</key> section.
