I'm having the exact same problem. Halting after DSMOS and Bluetooth. I tried both unifail and myHack and added the bootpack from EDP page. EDIT: This pack seems to solve it. https://osxlatitude.com/index.php?/topic/2559-e5520-bootpack-problems-with-intel-hd-3000-hd-1920x1080/?p=19467