[Guide] Success! Install 10.8 on old unsupported Mac | MacRumors Forums
Be advised, clean install is always recommended, you might encounter bugs with upgrades. To upgrade from V0.1 to V0.2.2, simply follow the guide but skip step 4 and 5, straight to step 6 If you want to do combo update from 10.8.x to 10.8.3 follow the step...