I have a 2012 Macbook Air. It shipped with 64GB SSD but I upgraded it to 240GB using a 3rd party manufacturer. I was planning on doing a clean install on the system but when I checked to make sure if I could download it, the installer failed to verify that I could install it on the machine. It is like the installer isn't recognising it as a Mac. Any advice?

  • What was the exact error?
    – mmmmmm
    Commented Sep 26, 2013 at 11:47
  • 1
    You should be able to install from a USB drive if nothing else. osxdaily.com/2012/02/17/…
    – Dave
    Commented Sep 26, 2013 at 12:50

2 Answers 2


OK so ultimately I was able to solve the problem and here is how.

I noticed that when tried to install OSX straight away it failed but when I selected a drive that had OSX installed on it, it validated successfully. However once I had erased the drive it no longer contained a copy hence validation failed. I still had my old SSD which contained a full copy so when I plugged that in via USB and selected it in startup disk, the installer validated it and allowed me to install OSX on the new drive.


Is your Macbook Air as a registered purchase on the Mac Server, I use to have this problem, then I registered by entering a valid date of buying, which it asked me for (a copy of the bill is required to do so). Now I can Install the Updates, Check by putting your Serial number here Apple warranty check enter image description here

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