Trying to get rid of my 2011 MBA. I can't remember the original OS, but I'm trying to re-install it. I'm assuming it was Lion, because it's prompting me to install Lion 10.7. I've tried "Internet Recovery" ..but basically the issue I'm having is I want to sell this computer, and the original OS should be tied to the machine, and NOT to my Apple ID. Before it comes to the step where it wants to install Lion, no matter what, it keeps asking for my Apple ID. I want to install the original OS, that's it. I've tried booting normally, Internet Recovery, and I keep coming back to the same prompt asking me to sign in to the App Store. Any help?