I have all the requirments, I have a macbook air a1237. Why I can not download el capitan?

Hello Guys. I have all the requirments for El Capitan. Why I can not download it from app store?

MacBook Air, Mac OS X (10.7.5)

howapple - hello


The specifications for installing El Capitan require a MacBook Air from late 2008, as yours is labelled as Original it may be too early in 2008 to qualify, these models were introduced in Jan 15 2008 and discontinued in October 14 2008.

So I think you are stuck with 10.7.5.