I'm not sure if this is the proper place to post this, but I am posting it here based on MacMan's instruction in the 8th page of comments for "MultiBeast 5.0 for Mountain Lion". I also posted it in the comments for "UniBeast: Install OS X Mountain Lion on Any Supported Intel-based PC" as that seemed to be tonymacx86's request on the "Updated Mountain Lion Installation Guide Now Available" page. --------------------------- I'm running a GA-H55M-S2V with a i3 540, and MSI N8400GS-D512H graphics. I tried to perform an update to my 10.7.4 machine, and have no problem installing ML using UniBeast 1.5.3. However, when I try to boot into the ML updated drive using UniBeast, I am getting a hang at [PCI Configuration Begin]. I tried the NPCI=0x3000 boot flag, but this caused the boot to hang 2 lines earlier than before. I then booted into my backup 10.7.4 lion instance and ran MultiBeast 5.0.2 against the 10.8 instance, but this didn't seem to help either. I used the appropriate DSDT when running MultiBeast, but I am not sure whether or not running MultiBeast against a drive that you are currently not booted into is a supported/recommended use of MB. I figured it couldn't hurt to try. I should point out that I selected "Legacy USB Support" in UniBeast, as my MB is a Socket 1156. I couldn't find the way to determine if my MB had a rate matching hub, and so I erred on the side of caution. Any ideas on what I should try next in order to be able to boot into 10.8? Prior to ML, I haven't had a single install issue with this machine, since 10.6.3 (if memory serves, that was the my first hackintosh OS nearly 2 years ago). Thanks very much!