campusloop

Just an update on this - Finally gave up and installed VoodooHDA which I can confirm is working well with Sierra on this laptop.

Now tried to install Sierra - 10.12.5. Install was all fine but even now I am stuck with no audio device - But I think there is some progress because kextcache now successfully updates with AppleHDA_IDT rebuilding //System/Library/PrelinkedKernels/prelinkedkernel kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext IOAHCISerialATAPI_Injector.kext kext file:///Library/Extensions/DisableTurboBoostBattery.kext/ is in hash exception list, allowing to load kext-dev-mode allowing invalid signature -67030 0xFFFFFFFFFFFEFA2A for kext AppleHDA_IDT.kext kext-dev-mode allowing invalid signature -67062 0xFFFFFFFFFFFEFA0A for kext AppleBacklightInjector.kext KernelCache ID: CE486D7D43B3D83CC69AA42AC8F2E658 kextcache updated critical boot files, requesting launchd reboot No idea why this is not working still.

I am trying a different approach now - Reinstalled the OS on a different partition, copied the kext in /L/E and did a boot. Setup the user and everything. So - /var/log shows the following message now - (no sound device available still) - Any idea on how to overcome this Jul 18 05:19:19 MacBook-Pro com.apple.kextd[24]: kext-dev-mode allowing invalid signature -67030 0xFFFFFFFFFFFEFA2A for kext "/Library/Extensions/AppleHDA_IDT.kext" Jul 18 05:19:19 MacBook-Pro com.apple.kextd[24]: kext signature failure override allowing invalid signature -67030 0xFFFFFFFFFFFEFA2A for kext "/Library/Extensions/AppleHDA_IDT.kext" Jul 18 05:19:23 MacBook-Pro kernel[0]: Sound assertion in AppleHDAEngine at line 18024 Jul 18 05:19:23 MacBook-Pro kernel[0]: Sound assertion in AppleHDADriver at line 2971 Jul 18 05:19:23 MacBook-Pro kernel[0]: Sound assertion in AppleHDADriver at line 214 Jul 18 05:19:33 MacBook-Pro kernel[0]: Sound assertion in AppleHDADriver at line 3685 Jul 18 05:19:33 MacBook-Pro kernel[0]: Sound assertion in AppleHDADriver at line 1103

Here is the output - MacBook-Pro:Extensions root# rm -rf AppleHDA_IDT.kext/ MacBook-Pro:Extensions root# cp -av /Users/campusloop/Downloads/AppleHDA_IDT.kext . /Users/campusloop/Downloads/AppleHDA_IDT.kext -> ./AppleHDA_IDT.kext /Users/campusloop/Downloads/AppleHDA_IDT.kext/Contents -> ./AppleHDA_IDT.kext/Contents /Users/campusloop/Downloads/AppleHDA_IDT.kext/Contents/Info.plist -> ./AppleHDA_IDT.kext/Contents/Info.plist /Users/campusloop/Downloads/AppleHDA_IDT.kext/Contents/MacOS -> ./AppleHDA_IDT.kext/Contents/MacOS /Users/campusloop/Downloads/AppleHDA_IDT.kext/Contents/MacOS/AppleHDA -> ./AppleHDA_IDT.kext/Contents/MacOS/AppleHDA /Users/campusloop/Downloads/AppleHDA_IDT.kext/Contents/Resources -> ./AppleHDA_IDT.kext/Contents/Resources /Users/campusloop/Downloads/AppleHDA_IDT.kext/Contents/Resources/layout12.xml.zlib -> ./AppleHDA_IDT.kext/Contents/Resources/layout12.xml.zlib /Users/campusloop/Downloads/AppleHDA_IDT.kext/Contents/Resources/Platforms.xml.zlib -> ./AppleHDA_IDT.kext/Contents/Resources/Platforms.xml.zlib MacBook-Pro:Extensions root# sudo chmod -Rf 755 /L*/E* MacBook-Pro:Extensions root# sudo chown -Rf 0:0 /L*/E* MacBook-Pro:Extensions root# sudo touch -f /L*/E* MacBook-Pro:Extensions root# sudo chmod -Rf 755 /S*/L*/E* MacBook-Pro:Extensions root# sudo chown -Rf 0:0 /S*/L*/E* MacBook-Pro:Extensions root# sudo touch -f /S*/L*/E* MacBook-Pro:Extensions root# sudo kextcache -Boot -U / rebuilding //System/Library/PrelinkedKernels/prelinkedkernel kextcache updated critical boot files, requesting launchd reboot MacBook-Pro:Extensions root# I did this after rebooting - rebooted again but no change - no audio devices available still.

There was only AppleHDA_IDT in the LE folder which was copied into /L/E. root# ls -ld * drwxr-xr-x 3 root wheel 102 Jun 13 2014 ACS6x.kext drwxr-xr-x 3 root wheel 102 Aug 27 2013 ATTOCelerityFC8.kext drwxr-xr-x 3 root wheel 102 Aug 27 2013 ATTOExpressSASHBA2.kext drwxr-xr-x 3 root wheel 102 Aug 27 2013 ATTOExpressSASRAID2.kext drwxr-xr-x 3 root wheel 102 Jul 17 13:19 AppleHDA_IDT.kext drwxr-xr-x 3 root wheel 102 Aug 21 2013 ArcMSR.kext drwxr-xr-x 3 root wheel 102 Sep 1 2013 CalDigitHDProDrv.kext drwxr-xr-x 3 root wheel 102 Aug 15 2014 HighPointIOP.kext drwxr-xr-x 3 root wheel 102 Aug 15 2014 HighPointRR.kext drwxr-xr-x 3 root wheel 102 Apr 28 2014 PromiseSTEX.kext drwxr-xr-x 3 root wheel 102 Jul 21 2015 SoftRAID.kext This is a 10.11.6 system. Running the above commands has the same output - error 77 rebuilding //System/Library/PrelinkedKernels/prelinkedkernel File at path '/System/Library/PrelinkedKernels/prelinkedkernel' changed, cannot be used Child process /usr/sbin/kextcache[528] exited with status 77. Error 107 rebuilding /System/Library/PrelinkedKernels/prelinkedkernel

Output - Praveens-MacBook-Pro:~ root# sudo chmod -Rf 755 /L*/E* Praveens-MacBook-Pro:~ root# sudo chown -Rf 0:0 /L*/E* Praveens-MacBook-Pro:~ root# sudo touch -f /L*/E* Praveens-MacBook-Pro:~ root# sudo chmod -Rf 755 /S*/L*/E* Praveens-MacBook-Pro:~ root# sudo chown -Rf 0:0 /S*/L*/E* Praveens-MacBook-Pro:~ root# sudo touch -f /S*/L*/E* Praveens-MacBook-Pro:~ root# sudo kextcache -Boot -U / rebuilding //System/Library/PrelinkedKernels/prelinkedkernel File at path '/System/Library/PrelinkedKernels/prelinkedkernel' changed, cannot be used Child process /usr/sbin/kextcache[662] exited with status 77. Error 107 rebuilding /System/Library/PrelinkedKernels/prelinkedkernel Praveens-MacBook-Pro:~ root#

Hi Guys Installed OSX El Capitan 10.11.6 on Dell E6430 - using the guide at https://osxlatitude.com/index.php?/topic/8506-dell-latitude-inspiron-precision-clover-guide/ Initially had screen glitches which went away by downgrading BIOS to A12, external USB WiFi is working too. Now am left with one problem still - getting audio to work on this - Intel HDA 8086 1E20. (Using the AppleHDA_IDT from the post on above page) I am very new to this - so any pointers on how to check for any specific issues would be very helpful.. Thanks.