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When trying to reinstall Lion OS on new mid 2011 Macbook Air, error msg 'This version of Mac OS X 10.7 cannot be installed on this computer' comes up. What should I do to reinstall?

When trying to reinstall Lion OS on new mid 2011 Macbook Air, error msg 'This version of Mac OS X 10.7 cannot be installed on this computer' comes up. What should I do to reinstall?

MacBook Air, Mac OS X (10.7)

Posted on Jul 24, 2011 8:35 AM

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100 replies

Aug 7, 2011 3:55 AM in response to jmk08

I may be able to share the .DMG. Just doing more testing. I think this will only wOrk on the 128GB SSD machines due to the partitions.


Also during the recovery, the recovery partition gets locked and on restore an error appears but it doesn't stop the restore. The error is because the recovery partition is locked.

Aug 7, 2011 6:41 AM in response to idroid84

Sounds promising iDroid84. Can you provide a little more detail on the steps you followed? I have made a boot Lion USB, and installed it on my IMac, on a second partition. I just got a 256gb MBA, and was assuming I could zap it anytime, and reload from my USB. Ugh. Glad I saw this thread. Right now I am still functional, and assume I can go into recovery, and download, but I don't want to do that every time. I intend to use the MBA for development, hence want to rebuild fairly often.


So, when you can, please share your steps. Thanks a ton for figuring this out!


Mat

Aug 7, 2011 10:30 AM in response to Alias808

I can confirm what Alias808 reports - as of yesterday, the build you download using Recovery is 11A2063. Interestingly, though, it appears that build cannot be used to create an install usb stick or dvd using the instructions that work for 10.7 purchased through the Apple store (e.g. http://lifehacker.com/5823096/how-to-burn-your-own-lion-install-dvd-or-flash-dri ve).


I let 11A2063 download and think it was going to install to an attached drive, but interrupted the process to capture the InstallESD.dmg image. I was successful in doing so, but when I burn that image to a dvd or restore it to a usb drive, the MBA will not boot off of either media.

Aug 7, 2011 1:31 PM in response to idroid84

Here's what I did:


- Using any mac, format a usb flash drive (at least 8 gb) as journaled extended.

- Connect the usb flash drive to your mba and boot into the recovery partition (hold cmd-R at startup).

- Choose "Reinstall Mac OS X".

- Choose to install it on the usb flash drive.

- The installer goes through two steps: 1) downloading Lion and 2) installing Lion. The progress bar will reset after it's finished downloading and when it starts installing. When it starts installing, power off the computer.

- Disconnect the usb flash drive.

- Boot back into your regular Lion partition on the mba.

- Connect the usb flash drive, and you will have access to InstallESD.dmg.


Note that this process leaves your recovery partition in a weird state - you will need to reset your pram after doing this, or it will forever keep trying to finish the install to the usb flash drive next time you boot into it.

When trying to reinstall Lion OS on new mid 2011 Macbook Air, error msg 'This version of Mac OS X 10.7 cannot be installed on this computer' comes up. What should I do to reinstall?

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