If following the instructions in the link below for clover install and clover does not boot, i have a tip for you.
If you get a black screen or no bootable device found error keep reading.
Hi All, just want to confirm that installation of Mountain Lion is as easy as installation of Lion (10.7.4.). Everything is fully working incl. onboard audio and sleep/wake.
...yes, old xbx2 is still supported :)