Though, this is a convenient method but it may take ages to download the essential recovery software to boot from internet if you are connected to a slow internet plan or you do not have an internet access at all. And those Macs purchased after Jwhen OS X Lion was released got an additional feature called Internet Recovery, which downloads the essential recovery software contents from internet to network boot your Mac.This becomes handy when your internal Mac’s hard drive is damaged or recovery partition is missing. Starting from OS X Lion 10.7, Apple stopped shipping DVDs of its operating systems and started offering a built-in recovery partition that is created automatically for you during installation.