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10.7: How to get a full Lion install disc for a new MacBook Air or Pro
Authored by: amoten84 on Oct 09, '13 03:33:54AM

I am responding because part of OP thread and one other method has worked for me.

My original issue:

Macbook Air 1st generation the Hard Drive got corrupted and would not boot up. Verify disk and Repair disk were greyed out on the Mac Image. Repair disk failed when I tried on the hard drive with error "Invalid Sibling Link". Was not able to unmount the drive or erase it either both failed. Recovery Partition was also locked and not accessible. Tried every possible solution. Sent in for a quote at an Apple Repair Centre and they came back saying the Hard Drive is corrupted and cannot be used, needs to be exchanged with a new one for a cost of 192. Tried searching everywhere online to find a bootable image of Mountain Lion but that also didn't work. So then I came to this thread and this is what I did:

P.S. I also have a Macbook Pro which is working perfectly fine so I used the steps on that to create the bootable USB.

So I followed up to this part

Open the Terminal, and type this command to list all partitions on your hard drive or SSD:

diskutil list

Look for 'Recovery HD' in the list, and note its identifier. It will be something of the form diskXsY, where X and Y are numeric digits. (On my machine, it's disk0s3).
Type the following command to mount the recovery HD:

diskutil mount readOnly /dev/[identifier]

Replace [identifier] above with the identifier from step 2. So on my machine, I typed:

diskutil mount readOnly /dev/disk0s3

The disk image inside the recovery HD is invisible, so use the Terminal to mount that too:

hdiutil attach "/Volumes/Recovery HD/"

Then I went ahead and installed Lion DiskMaker from here ran that application and inserted a 8GB USB Drive. The application found the Mountain Lion Image from my computer which was visible after following the first five steps of this thread and created a copy of it on my USB, and made it bootable. Then I went back to the faulty Macbook Air. Turn the Power on and held CMD/Option + R until the Apple logo came up and then let it go. After 5 minutes or so the DiskUtility screen came up, and from there I choose the Startup Disk option from the top menu. Make sure the USB you created is plugged in so it can detect the new image and then the computer will restart with that USB, and just follow the on-screen instructions from there.

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