Really shouldn't matter in the leats truthfully. My colelge told me before I went that they didn't support Macs. This wording is kinda tricky as what they really mean to say is they don't provide any technical support for macs. Other than that the Mac was actually a helluva lot easier to get on the school network and all. I was able to do everything on par and possibly better thna many o the pcs in the school. In fact I discovered there was a sort of underground mac culture amongst the techies in the IT dept. They simply didn';t have the resources to support another platform in the hands of typical users. However if you know how to use your computer yourself, you hould have no problem.
Also a lot of colleges are more unix centric than naything else fomr what I've seen, at least fomr the network backbone and to some degree remote application services and what not. So Mac OSX is at home here to a degree.
You should probaly email the It dept of wherver you'e going beforehand just to be sure. I know busniess courses don't like Macs sometimes because we're "non-conformist" and engineering depts may not like Macs due to obscure old serial connecting physics equipment and all.