I do have the same specs but, I'm not sure why it isn't working, I got the audio to work however by adding the AppleALC.kext to the kext folder in Clover, I configured the .plist file to boot with the argument alcid=3 and both audio and microphone work fine. On the other hand the Ethernet is not working at all, i think it has the Realtek RTL8111G-US but im not certain, i tried adding the RealtekRTL8111.kext with no luck, i'm currently using a USB tethered connection to use WiFi on the laptop, but i still want Ethernet functionality.
config.zip