It’s pretty easy: http://eggfreckles.net/notes/installing-mountain-lion-clean/ http://eggfreckles.net/notes/installing-mountain-lion-clean/ I have used this pr

It’s pretty easy: http://eggfreckles.net/notes/installing-mountain-lion-clean/ http://eggfreckles.net/notes/installing-mountain-lion-clean/ I have used this procedure many times, it works like a charm. However, I do want Apple to provide a more obvious way of doing just that. It would be great if their tool for creating a bootable recovery manager worked just with the OS X install app as a source. But to be honest, I do not think that doing a clean install is a good idea for the most people and for defect HDDs, new Macs at least come with internet recovery (but the older ones are still a problem).