Despite the "I'm a PC I'm a Mac" TV ads, Mac OSX market share actually fell while Vista seems to be gaining.
According to Computerworld:
"Windows Vista more than doubled its market share in March from the prior month, while the share of computers running Mac OS X fell for the first time in nine months, according to statistics released today by market research firm Net Applications.
By the end of March, Vista was used by 2.04% of computers connected to the Internet, according to the Aliso Viejo, Calif.-based company. That's up from 0.93% of PCs in February.
Now ranked the fifth-most popular operating system by Net Applications, Vista jumped ahead of Windows 98, which had a 1.36% share. Vista still trailed its seven-year-old ancestor, Windows 2000, which had 4.71% share in March.
The share of PowerPC-based Macs fell, though, from 4.29% in February to 3.94% in March. That dip was not fully offset by an increase in Intel-based Mac hardware, leading to a overall net decline in Mac share of 0.3%, to 6.08% in March.
Vista has now been available to consumers for two months -- and to businesses for four months. Microsoft said last week that it had sold more than 20 million licenses of Vista, eclipsing the 17 million licenses for XP it had sold in its first two months of general release."