Awesome

Dell E6440 Opencore EFI Folder

What is working: Everything works except some issues in bluetooth and in sound when connected a Headphone

Wireless card is Intel 6235 working very well.

Instructions:

1. Change SMBIOS Serial Number with GenSMBIOS.
      MacBookAir6,2 or MacBookPro11,4.   
2. noise in headphones can be fixed by downloading using alc-verb in AppleALC Releases.
   open a terminal at the folder where alc-verb is downloaded. and give the following command 
    hda-verb 0x1a SET_PIN_WIDGET_CONTROL 0x24

Links:

GenSMBIOS, Choosing SMBIOS, AppleAlc Releases, Noise Fix Reference