I have to use a Mac for work and the fact that it cannot do focus-follow-mouse makes it extremely painful for me. Add to that the lack of track-point (although that can be solved by adding a keyboard, but not so convenient when travelling) and that makes it, as far as I am concerned, the most useless laptop ever produced.

Even MS Windows let's you switch to focus-follow-mouse and use a piece of hardware with a track point.