Need to reinstall OS on new Mac Book air

Question

I purchased a new mac book air and migration assistant overwrote the whole hard drive.  I want to red o migration assistant and select only some applications.  How do i reinstall mavericks and all the applications to the original state? Computer came with no disks??

Answer 1

What you are trying to do is erase the storage and reinstall Mac OS X.  To do that, restart the MBA and hold the Command and R keys.  That will restart you on the recovery hard drive partition, what Apple now uses instead of an install DVD.
From the menu bar, select Utilities, then Disk Utility.  Highlight the internal storage name in the left side bar, usually Macintosh HD, and then select Erase in the button bar top center of the main window pane.
After the storage is erased, Quit Disk Utility and from the Utilities on the menu bar select Install Mac OS X.  That will download the Mavericks installer and reinstall the operating system.  This will take some time as the installer is about 5.1 GB...you need a good internet connection because this is downloaded from Apple's servers.  Also, be sure you are plugged into a wall outlet and not running on battery power.  You do not want the machine to shutdown during this.
After you have reinstalled, you are at the out-of-the-box form of the MBA and will have to resetup all of your information from scratch.