Installed new SSD on Macbook Air now won't let me reinstall OS 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?
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.