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  1. Today I want to say about new method which allow to not take care of loss of sound after each update. Let's recollect what AppleHDA demand from us. 1) To create device of HDEF in DSDT in which made necessary Layout 2) Binary patch of AppleHDA 3) Entry of PinConfig in plist of AppleHDAHardwareConfigDriver 4) Entry of description of input/output to layoutXX.xml.zlib 5) Entry of necessary nodes to Platform.xml.zlib. And of course all of these parts are changed while updating is going on. Here we go. Patch is made by bootloader. And three or four patches are necessary for it. Let's look at my case for ALC670 from Mavericks(use Property Plist Editor to see correct values). For the case of Clover(XPC and bareBoot also should do so) <key>KextsToPatch</key> <array> <dict> <key>Comment</key> <string>Patch_to_ALC670</string> <key>Find</key> <data>hAjsEA==</data> <key>Name</key> <string>AppleHDA</string> <key>Replace</key> <data>AAAAAA==</data> </dict> <dict> <key>Comment</key> <string>Patch_to_ALC670</string> <key>Find</key> <data>eG1sLnps</data> <key>Name</key> <string>AppleHDA</string> <key>Replace</key> <data>em1sLnps</data> </dict> <dict> <key>Comment</key> <string>Patch_to_ALC670</string> <key>Find</key> <data>hBnUEQ==</data> <key>Name</key> <string>AppleHDA</string> <key>Replace</key> <data>cAbsEA==</data> </dict> </array> 8408ec10 -> 00000000 without it my codec doesn't work at Mavericks at least 786d6c2e7a6c -> 7a6d6c2e7a6c bin-patch to change ApppleHDA xml->zml(This idea was suggested by abxite) 8419d411 -> 7006ec10 bin-patch for my ALC670. After that we go to the /System/Library/Extensions/AppleHDA.kext/Contents/Resources and make so layout65.xml.zlib->layout65.zml.zlib Platforms.xml.zlib->Platforms.zml.zlib And what we have. Bin patch, Invariable layout and Platform. And what about PinConfig which is disposed in AppleHDAHardwareConfigDriver. It is also not hard. 1) We should create simple kext ALCXXX.kext which should contain plist like AppleHDAHardwareConfigDriver(See sample of ALC670) My pinconfig is placed at thirteenth array of AppleHDAHardwareConfigDriver(ALC885->ALC670) 2) Or you can add necessary information to the plist of FakeCMS Here is sample of it http://www.insanelymac.com/forum/topic/290092-how-to-patch-applehda-with-the-help-of-bootloader/?p=1929163 ALC670.zip Property List Editor.zip