A flash drive that can be formatted, anything 8 GB or bigger is fine. Whether this is Lion or Snow Leopard, or Leopard, hackintosh or Mac, it doesn't matter. Access to an OS X computer, where the 'Install Mac OS X Mountain Lion.app' is. philip_petev's HP ProBook Installer from here: A legal purchased 'Install OS X Mountain Lion.app' from the Mac App Store This version of the guide is updated to use ProBook Installer v6.1 (beta), which has support for 10.8.3 and the ProBook 4x40s series laptops. This is mostly thanks to the fact that the hardware is very generic and well supported by current versions of Mac OS and to all who have contributed to the process including tonymac, MacMan, blueking, tegezee, Mieze, Zenith432, kozlek, bcc9, BigDonkey, philip_petev, Mac4Mat, RehabMan and others who spend many hours messing with the technical details to make things run smoothly. Installing Mountain Lion on the HP Probook 4x30s/4x40s series laptops is actually pretty easy (compared to other hacks you may attempt). So, open a new thread for your issue, or resolve your issue by reading the FAQ or doing a search.

I do not want this thread to be one of those 25-page threads with a bunch of random questions in it. If you have an issue with your laptop after following this guide, please DO NOT reply to this thread. If you have an issue with this guide, please post a reply in this thread and I will try to address it with an edit (and then delete your post). Building a CustoMac Hackintosh: Buyer's Guide

Os x mountain lion select disk