My mother who lives in utah, came across a coworker trying to sell his mac laptop for extra cash. well my mother doesnt know much about comps and I have never owned a mac. So she reads me all these numbers because they have no idea what model or how old the computer is. she says it looks really nice but the guy only wants 600 for it. the serial number is w8719j4bya3. im having a really hard time finding info on it. I have found a few things that told me the resolution and cpu speed but I cant find anything else. does anyone know anything about what kind of mac this is?