Re: Confused about Mac's
"Oh what fun if you've bought a second hand mac and you don't have the version of the OS it ships with tied to your iCloud account."
You can download a .dmg file that contains the whole MacOS install. There are plenty of instructions on the Internet about how to convert that to a .iso which can be burnt to a DVD and installed without going anywhere near an iCloud account.
Sorry, I wasn't clear; what I meant was... 'Oh what fun it is trying to use internet restore if it tries to restore a version of the OS you don't have tied to your iCloud account'
I have a 2012 air and if completely hosed it will try and download the version of OS X it shipped with; which I don't have a licence for, so it fails.
Downloading the dmg and building a USB/SD bootable media is indeed the solution. :)