When Mac OS X Lion 10.7 was released in October 2010, it introduced the OS X Recovery tool, which is stored on a separate partition of your computer’s internal hard drive. Apple has never released restore disks for Lion and the current operating system, Mountain Lion 10.8, because those operating systems have been distributed through the Mac App Store as digital downloads. If your Mac is currently running Lion 10.7 or later, then you can restore your computer to factory settings with the OS X Recovery tool . Tips Warnings Writer Bio

How to Set a MacBook to Factory Reset Without Disks - 92