Apple's PC Marketshare up to 14 Percent for February 2008
According to preliminary data from NPD, Apple reportedly achieved 14 percent of the U.S. retail PC market share in February 2008, up from 9% just a year ago. This represents 60 percent unit growth and 67 percent revenue growth year-over-year.
Mac Notebook sales were up 64% year-over-year and Mac Desktops up 55% year-over-year, with strong sales of the MacBook Air this February.
Unfortunately, historic NPD data is not publicly available. Previous reports of Apple marketshare have been gathered with very different methods so are not directly comparable. The trend, however, is consistent with reports of Apple's growing popularity.
In 2001, Apple launched their retail store initiative with the slogan "5% down, 95% to go", referring to market share.