Identify my macbook air 13.3
I got an old macBook Air 13.3". I really don't know from what year. All the printed tekst on the backside is worn and illegible, but i can read the serial number but the only thing Apple say about that nummer it is a MacBook Air Originall. Nothing more. No type id, not even a product specification. Nothing.
The man who gave me this computer hasn't used it for years, he doesn't know how old it is, what OS belongs on it. He didn't even know the password. After a lot of research, I was able to change that password via the command line, unfortunately without seeing what the old password was. I was given this computer to practice using an Apple, but also to get to know the hardware better. There were a few persistent problems that made me decide to restore the operating system to its factory settings. And that is where things went horribly wrong. Either I erased the whole disk or part of it, but whatever manual I follow, no key combination works except one. Start up with the Option button pressed. Then I get a white screen with a lock where I have to enter a password. The password I replaced myself doesn't work and I'm sure the firmware password is disabled and has never been enabled. Unfortunately I am not completely sure but I thought OS X Mountain Lion or Mac OS X Leopard was on it. I got it with some art and flying with a Windows PC on a USB Flash drive using TransMac and the .dmg installers. But now that password and the fact that no other key combination works. The only result is a white screen with a maplogo with a question mark in it flashing.
What are my best chances of getting an operating system on it again but also what type of laptop I have here so I can find the right Firmware Restoration for it. Or I'd better throw away the whole hard drive and start all over again.