This guide will show you how to natively enable audio with AppleALC.kext for patching & injection. With this new kext by vit9696, audio won't be affected by software updates and SIP/kext injection can remain enabled, as the kext is injectable from the EFI partition.
NOTE: This guide requires Clover. You NEED an original, unpatched AppleHDA.kext. This guide is for OS X 10.9 and above; older versions require different patches and are not fully supported by AppleALC.kext.
Step 1: Layout ID Injection
This can accomplished in several different ways. You can edit Clover's config.plist to do so, or do edits to your DSDT. Make sure you pick the right layout ID for your setup.
Supported layout IDs
Look at the AppleALC wiki for the supported layout IDs for each codec.
Clover config.plist editing
Edit the Inject key under Devices/Audio in config.plist. If it doesn't exist, paste it in. It is recommended that you use a propertly list editor such as Xcode & PlistEdit Pro. I would advise against using Clover Configurator.
<key>Devices</key> <dict> <key>Audio</key> <dict> <key>Inject</key> <integer>1</integer> </dict> </dict>
Replace 1 with the layout ID you wish to use.
Step 2: Download and Install AppleALC.kext
Download the latest version of AppleALC from the GitHub Releases page. Mount your EFI partition, and copy it to Clover/kexts/$OS_VERSION or Clover/kexts/Other.
If you followed this guide correctly, you should now have working audio after a reboot. You can safely enable System Integrity Protection (SIP) as long as you are injecting your kexts from the EFI partition.
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