Well Apple's are expensive anyway, I think they are expecting that if you are getting an apple your parents will be paying for it who they would expect to be in a full time job earning £800+ a month, A bit unfair I know (especially if your parents aren’t prepared to buy you a laptop) but its the only way they can guarantee that they will get the money for the laptop as a students income is rarely a steady one.
I'll be the first to say it, since someone will:
It's an oman. Don't get a Mac! Why oh why would you get a mac?!