Read Instructions Carefully
OS X Realtek ALC885 through ALC898 Onboard Audio
HDAEnabler1.kext installed with a Realtek AppleHDA.kext enables OS X Realtek ALC onboard Audio on Intel based motherboards with a bootable clean install of OS X. HDAEnabler1.kext injects Audio_ID = 1 for non-DSDT systems.
In ML, The audio_HDAEnabler1.kext supports
1. Audio_ID: 1 for 3 (no 5.1), 5 and 6 port Realtek ALC onboard Audio
2. Realtek Audio codecs: ALC885, ALC887, ALC888, ALC889, ALC892, ALC898
Install HDAEnabler1.kext with Terminal, DPCIManager, Kext Wizard, etc.