Historically, Apple’s sales to business and government buyers of personal computers have been, in a word, minuscule. To put a number on it, Forrester published data where the estimated value of those sales in 2007 were 2.8%. A figure lower than Apple’s overall market share of PCs in that time frame.
Things did not improve much in the years following. The following chart shows the split between Windows and Mac OS X for the value of enterprise computers sold in 2007 through 2009.
Apple’s share of value went from 2.8% to 3.7%, an increase of 1 point of share, but one which in real terms was not very valuable because the overall market declined due to recession. Revenues for Apple were basically flat at around $2 billion each year as shown in the second chart.
However, the situation changed very rapidly in the last two years.