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System Volume working fail 10.9.0 - Dell N5050

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I am installed Maverick 10.9.0 on my laptop Dell N5050, all work fine, but system volume in top bar not working. When I increase or decrease, the volume level not changed. I open iTunes, open a music file, and change volume (+ or -) in iTunes, it work fine and other application, also. But system volume not effects when changed (+ or -)

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Any answer? I have same problem :/

I found a solution :) Update VoodooHDA here. Install by Kext Wizard. After install successful. Do not close Kext Wizard window. Open terminal, type: sudo nano /Applications/VoodooHDA.kext/Contents/Info.plist. Find VoodooHDAEnableVolumeChangeFix key and change value to true, look like:



Back to Kext Wizard window, select tab Maintenance, tick Rebuild Cache option and click Execute button. Reboot and done.

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