The Mac still owns a tiny market share compared with Windows, but it's one that's slowly been inching up.
In the U.S., Apple held 6.45 percent of all personal computers last month, according to new data from Net Applications, a gain from 6.03 percent from August. The growth from the prior month isn't a surprise, though, since Apple typically enjoys a boost in September thanks to what Net Applications calls "the Back-to-School Bump."
But the latest number also shows a slow but steady rise over the past couple of years from October of 2009 when Apple's share was 5.34 percent. The Mac's standing in the U.S. in particular has grown, hitting a 13.74 share in September, up from 13.26 percent in August.
Some analysts, such as Deutsche Bank analyst Chris Whitmore, have seen thebeing lost by Windows PCs. Mac sales did experience a thanks to the launch of OS X Lion and other new products, according to NPD. At the same time, PC sales stayed steady with only a 4 percent rise.
Of course, Windows is still by far the king of the desktop with a 92.4 percent share in September, a minor decline from 93.67 percent two years ago.
Drilling down to the different flavors of Windows, XP continues to be the dominant version with 50.5 percent of the market, leaving Windows 7 with 32.4 and Vista with 9 percent. But XP's lead has gradually been fading, for the first time ever in July and then falling futher in August before inching up last month.