I'm purchasing a used 2013 Macbook Air on craigslist and the seller told me he formatted it already and created a dummy account so I can go through settings, etc.. and browse around to ensure all is working.
I want to be sure that I do not get locked out of the Macbook Air. If he formatted and logged out of iCloud, what is the best way to check that I will come out of this purchase safely? Should I log myself into iCloud and turn on 'Find My Mac'?
The reason is it is an old OSX so I need to do some updating afterwards. I don't have experience buying used macbooks so any help is appreciated, thank you.