My advice is to save for the MacBook.
If you cannot afford to purchase the computer outright with the cash you have, then you cannot afford to open a line of credit.
Not to mention that by opening a line of credit and purchasing the MacBook, you'll end up paying a LOT more for the MacBook than you think. With compounded interest and everything taken into account, a $999 MacBook ends up costing over $1,300 or more in the end. Hardly a "good deal" if you ask me.
Don't be tempted by lines of credit and "payment plans." Save for the MacBook... do odd jobs... mow lawns... clean gutters... you'll have $1,000 before you know it, ready for a new MacBook purchase.
A credit card (which is what "getting financed" through Apple is -- you're opening a line of credit identical to a credit card) is not, contrary to popular belief, a method to purchase items that you cannot afford and slowly pay them off over time. A credit card is for convenience, so you can purchase many things that you could afford, but prefer to lump the payments for all those things together at the end of the month and pay once instead of multiple times.
A good rule of thumb is if you can't afford a MacBook now, then you can't afford a MacBook period. A better angle to work is something with your parents (or financial supporters). How much money do you have right now? Ask your parents if you'll put down, say, $400 right now if they'll cover the rest for you, and you will pay them back $100 to $200 a month until the entirety of the balance is paid off. It will show your parents that you're willing to actually save for something you want, instead of just wanting something immediately and screwing your credit score trying to get it simply because you didn't want to wait and save like a smart person does. It will also show them that you can take financial responsibility for yourself (as long as you stick to your monthly payments).
That's a much better scenario for you than opening a line of credit in your name at this point in time.
If you really want a MacBook right this minute and just can't afford the delayed gratification of saving for something, then your only other option is criminal in nature (i.e., stealing). If you don't have the money, you don't have the money. If you can't afford to drop $1,000 on a MacBook, then there are obviously other expenses that are more important than a new computer that need taking care of above and beyond a luxury item such as a computer.
On a side note, read the sticky at the top of this forum section -- this is not the section in which to ask questions. This section is reserved for people posting "How-to" tutorials, not to ask "how to" do something.
