But comparisons between OS X and Windows, even those that rely on shares of each platform, are risky at best: Windows runs on 1.5 billion machines worldwide, while OS X's global user base is approximately 80 million, giving the former a 19:1 edge. That means it is much tougher to move the needle on Windows since 19 times more users must have adopted a specific edition, or preview, to reach the same share as a version or preview of OS X.
Apple has not revealed a release date for Yosemite, but most outside observers, including Computerworld, expect the Cupertino, Calif. to ship the finished version in the second half of October, the same timeline used for OS X Mavericks in 2013.
The release of a public beta of OS X Yosemite last week tripled the upgrade's share of all Macs, according to traffic data monitored by ad network Chitika. (Image: Chitika.)
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