What happens next?

How to convince your parents to buy you a mac
Figure out your situation first.
Do you already have a mac? If so, they will not want to pay for another one. Do your parents have pcs that are constantly slow for your use? Make sure that your reasons will mean something.

Pick your answer from:
i. If they don't like the idea of you using an expensive mac then it's okay to buy a newer one. This way, you will also pay for it anyway because your parents will know.
ii. Understand that they might think you are too young. For example, if you wanted one in 3rd grade versus 6th.
iii. Were your parents really expecting you to buy one? That would upset them. If they asked what would happen if you didn't buy one, then ask them beforehand.
iv. Talk to your friends about the idea of buying one. Spending time with your friends will make your plan easier.
ii.