GX620 onboard Audio

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>0x266e8086</string> into <string>0x27de8086 0x266e8086</string> (thus add 0x27de8086 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>0x266e8086</string> just search for this string in the <key>ICH6 AC97 Audio</key> section.