From: "Rich Gauszka" 

The increase doesn't seem to be at the expense of Windows though

http://www.computerworld.com/action/article.do?command=viewArticleBasic&article
Id=9018641&source=Macbidouille
The portion of people surfing the Web using a Mac has doubled in the past
eight months, an Internet metrics analyst said today, and represents an
audience that can't be ignored by Web application developers.

"The amazing story since last summer has been how well the Mac is
doing," said Geoff Johnston, an analyst at WebSideStory Inc. in San
Diego. "For the longest time, Mac hung around 3% of the operating
systems using the Web. But it picked up around last summer, and has nearly
doubled its market share."

Measurements from WebSideStory and rival Net Applications of Aliso Viejo,
Calif., put Apple Inc.'s Mac OS X at close to or just over 6% of all
machines in the U.S. that connected to the Web last month

"For the first time since 1999, when we started tracking, the Mac has
really made a major push," said Johnston. Since August, the percentage
of online Macs running Apple's operating system has climbed from the
long-flat 3% to 5.6%, he said. Net Applications data, which splits the
Mac's share between computers running the PowerPC version of Mac OS and
those with an Intel edition of the operating system, pegged the total share
at 6.2% for April.

"Mac has almost doubled," Johnston said, "so you know
they're selling a butt load."

.....

Net Applications' numbers, however, show Windows holding firm. In the first
four months of 2007, Windows' overall share of Web-connected computers has
stayed steady at around 90%. Only the mix of the various editions of
Windows has changed. Windows Vista's part of Microsoft's operating system
market share, for example, has climbed from just 0.2% in January to 3% in
April, reported Net Applications. That gain on the part of Vista came at
the expense of Windows XP and Windows 2000, both which have lost market
share this year.

After losing ground last month -- possibly to Vista -- the Mac share
rebounded from March's 6.08% to April's 6.21%, noted Net Applications.

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