There are separate computer labs for engineers.
I'm not in engineering, but in chemistry, specifically, there are some programs that to this day work better on Mac/Unix than on Windows.
40% of our campus is Mac and that number is rising (or maybe it was 40% of freshman use Mac and that number is rising)...
Anyway, comparing the software lists form PC and Mac
http://software.brown.edu/dist/sw-mac.html
I don't see anything that you couldn't use on a Mac (or some equivalent) for PC that you'll be able to use from home. Some of the more specific programs are too expensive to buy licenses for all students and will probably only be available in Barus and Holley.
Beyond that, if it was really a problem, you can run Windows on a Mac better than most PCs can run Windows, so just dual boot Windows and OSX if OSX is more comfortable for you.