Hi, my fiancees sister needs a laptop, and I'm going to give her my old 2013 MacBook Air. I now have a 13 inch TB, and while I was considering returning it in view of battery life, this is just the excuse I was looking for to decide to permanently keep it (I rather like it, just assume I'll have some buyers remorse when V2 drops). My understanding is that to give away an old MacBook, one is to (1) log out of iTunes, (2) sign out of iCloud, (3) sign out of iMessage, (4) erase and reinstall MacOS. Now, I imagine that if I did that, mailed it to her, she would be able to follow the standard prompts and create an account, and so forth. However, it'd be running an OS from 2013, and unless it literally forces her to upgrade I really doubt she will. Ignoring whether some people prefer the version from 2013, I would prefer her to be running the most current OS. Is there any way to do the above 4 steps, and then have it so that when she starts the laptop the OS version is the most recent? For instance, can I make an account, upgrade everything, then somehow delete my account while retaining the most recent OS version?