I also tried installing Niresh Mountain Lion 10.8.5 on my computer. I tried installing through VirtualBox and keep getting stuck right after this error:
WARNING! IOPlatformPluginUtility : getCPUIDInfo: this is an unknown CPU model 0x3c
I tried using different combos of boot flags such as -v -x -f cpus=1 PCIRootUID=1 npci=0x2000 etc.
Intel i5 4200M w/ Intel HD Graphics 4600
8 GB ram 1 tb hard drive
*Also I am booting through VirtualBox in legacy mode as UEFI doesn't virtualize very well with VB. Any suggestions?