1st Year civil engineeringWatch
The downside is that many programs you'll encounter especially during the later years of the course (such as finite element software) are not available on Mac. You can of course use Boot Camp or Parallels Desktop to run Windows on a Mac but (for me anyway) it is sluggish. There are some software that you may use during your course such as MATLAB which is available on Mac. but you'll find that the majority of them require Windows.
You'll find yourself using Excel a LOT and you'll definitely use AutoCAD (which is available on Mac).