Microsoft owns the desktop (still)

Why don't you work on Macs? I am occasionally asked this my answer is always that there is no requirement for me to do so as there are so few Macs out there.

Currently of all the PC devices out there including, devices using Android etc, the Microsoft Windows operating system exists of over 90% off ALL machines that browse the web.

 Statistics Date - Sept 2010

 If I was repairing Macs for a living I wouldn't get much business based on the above statistics.