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July 27th 2011 8:05 am

How do I restore my MacBook Air to factory settings?

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Hold down CMD+R while the computer is booting. This will boot into Lion's recovery partition and you can use the disk utility to format the hard drive and reinstall a clean instance of Lion.
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This is from regarding Lion recovery:­/macosx­/recovery/

Summary: during startup, hold down command-R, and select the recovery drive. From there you can use Disk Utility, reinstall Lion, or restore from a Time Machine backup.
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You should've gotten a usb stick with your machine. Boot it.

Simple as that. That stick has your stock OS and iLife.
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