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Discussion in 'MacBook Pro' started by Lil.Edward, Nov 3, 2012.
how do i reinstall mac os x mountain lion i bought the laptop and it came with the system.
OS X: About OS X Recovery
Apple - OS X Recovery restores your Mac with a few clicks.
Hands on with Mountain Lion's OS X Recovery and Internet Recovery | Macworld
Just hold the command-r keys as you boot and you will get a screen that has a reinstall option.