I showed a friend my macbook other day and well he loved it but wanted something light. So I suggested he look at macbook air. So off he went happy as larry to find one. Now he a bit of an idiot so I said show me before you buy it. Well he did not! He was in such a rush to buy a mac he bought a air, a very nice one with i7 but it kinda useless. It has a efi password. He bought from a guy on facebook. He sent me photos of it and the screen with efi password prompt. Also the receipt for the machine from the apple store where the seller bought it. He forgot the password so stuffed it in box under bed. He decided to sell it but my friend being the idiot he is now has a £350 paper weight. Can it be removed? Or has he wasted his money. He told me seller said it had a password. Thing is my friend assumed as I work for a repair company I can remove it. My engineer colleagues are windows trained and know nothing of apple. This is why I told him show me what he found before buying it. I'm not apple wizard but I would avoid such a machine personally.