Most of the software you use will be on campus because it's ridiculously expensive. There are some pieces which are Windows compatible only.
The only thing I use my laptop for, academically, is writing reports on Word. Occasionally I use it with Sketchup and similar freeware CAD packages to quickly sketch things, but it's no good for the real heavy lifting operations required.
I'd save the money, get a Windows laptop (mine was £300) and use the rest of your money paying towards bills or saving it to put as a deposit on your accommodation for the second year. You could just add it to your food budget or keep it in your savings. I really see no major benefit to owning a Mac at the best of times, let alone for this.