Maybe according to Gene Munster in FORTUNE.
An excerpt:
http://tinyurl.com/33t6mx
"Market Share: According to IDC, Apple¹s worldwide market share grew
from 2.4% in 2006 to 2.9% in 2007. (See chart below.) Munster is
conservatively modeling global market share to remain flat this year,
but he notes that enterprise sales account for 70% of the worldwide
market, a segment Apple is not aggressively targeting. In the consumer
market, where Apple does compete, he estimates the Mac¹s share is now
10% worldwide and an impressive 21% in the U.S."
--
Jim