Well let’s start off talking about Mac, you can see by Mac’s OS X that they are doing brilliant, it seems that a lot of people are choosing Mac’s over windows boxes.
But looking more into Mac you will find that it is actually based around Linux and Microsoft where the odd ones out until the release of vista that contain few things that are made like Linux.
So looking if Linux have the power to overtake Microsoft they obviously do, and they are catching up fast from looking at Google trends you can see that Ubuntu Linux are actually overtaking Mac OS X. This has to be good seeing how good Mac is doing.