The question; “What is Apple’s share of the PC market and how fast is it growing?” is simple enough, but the answer is complex. It is obvious to anyone who reads the news that Apple is growing strongly in the PC market and has become a force to be reckoned with, but how much of a force? Let’s examine Apple’s market share from as many dimensions as possible and maybe we’ll get a clear picture. We’ll begin with the global perspective.

The Global Figure

Total worldwide sales of PCs (according to both Gartner and IDC) rose to about 270 million in 2007. Apple had a little over 3.2% of that. That’s not much is it? If you were Microsoft, would you feel threatened by a competitor getting less than 4% of a market where you get well over 90%?

Apple’s Share of the Global PC Market = 3.2%…….(I)

You can see it that way if you want to, however…..

Eliminating The Business PC

Let’s split the market up between home PCs and corporate PCs. IDC and Gartner treat these two distinct markets as one, but they really are two distinct markets. Apple is, in Steve Jobs’ words, a consumer electronics company. It only targets a small part of the corporate PC market; high-end PCs and workstations. That market amounts to only about 1 percent of the whole market and HP and Dell pretty much dominate it. However, some businesses do buy and use Macs instead of PCs. It is difficult to sort out how big that number is.

The best handle I’ve got on this is the buying intention figures published by ChangeWave. ChangeWave carries out regular monthly surveys to determine US buying intentions for both laptops and desktops, and it provides figures both for the home market and business market. So in the period from May 2006 to November 2007, Apple buying intentions amongst consumers rose from about 12% to 29%. Impressive! Amongst business users the figures rose from 2% to 6% (desktops) and 2% to 7% (laptops). So the ChangeWave Charts suggest that business buying intentions are between one fifth and one sixth of consumer buying intentions.

So it’s reasonable to extrapolate that the same level of converting from intention to purchase will apply to both (but it is not reasonable to expect every “intention” to result in a purchase; that doesn’t happen). Incidentally, the figures suggest that the Home PC market drives trends in the business market, because consumers are businessmen too - I guess. Apple gets dragged into the business market by success in the home market.

Using these figures, it’s fair to assume that about 16% of Mac sales go to businesses, and as businesses account for roughly 33% of the total PC market at the moment, we need to adjust Apple’s market figures if we want to consider just the Home PC market. Working through the percentages we can conclude that Apple’s Home PC market share is about 25% greater than it is of the total market.

Apple’s Share of the Global Home PC Market = 3.2 x .84 x 1.5 = 4%…..(II)

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