I jumped straight in like a moron, trying to enhance my audio for my (macbook pro 15" early 2011 edition). I have gone from completely losing my audio, to losing audio controls and displaying no input/output devices (not detecting onboard), to now crashing the computer and receiving a panic kernel from trying to fix it with an VoodooHDA install. Mistakes: 1. Using unfamiliar software: selecting the wrong audio codec Realtek "ALCxxx", lost audio capabilities. I selected DSDT free in which all native apple's have DSDT (All Apple computers have a dsdt and the Cirrus Logic 4206, a proprietary audio codec). 2. Tried various other versions of "ALCxxx" to no progress. 3. Installed a universal version of VoodooHDA 2.7.3 (Rather than Realtek); I now experience computer crashes and kernel panic codes every so often. Questions: Did I essentially fry my onboard sound?! I don't think so because on boot/start up it chimes which is sound......Yes, pressing the volume speaker icons show up grayed out and mute logo beneath; system preferences > Audio > No input/output devices detected and also mute icon is check - grayed out. I need some resolution; apple support wants to replace the logic board which is ridiculous and cheaper to buy a new PC. I tried seeking help here: http://www.tonymacx86.com/audio/112461-mavericks-no-audio-realtek-alc-applehda-guide-29.html I was essentially told to piss off; the didn't handle native apple devices.