The developer preview of Apple's next version of OS X – OS X 10.10 Yosemite – is almost four times more popular with developers than the developer preview OS X 10.9 Mavericks was at the same point in its lifecycle.
Measuring OS X ad impressions from users between June 2 and July 2, web ads and analytics firm Chitika found that developer preview of OS X Yosemite was being used on 0.15 percent of Macs in the United States and Canada. By comparison, the developer preview of OS X Mavericks that was released last year took around 30 days to reach 0.05 percent of measured web traffic.
This, according to Chitika, bodes well for OS X Yosemite:
"Overall, the data point to a promising future for OS X Yosemite. In the short term, we expect the operating system’s usage share to grow in the wake of the release of the third Developer Preview edition on July 7, 2014. Additionally, with the increased level of developer activity thus far, along with the success of the similarly no-cost OS X Mavericks, it’s very probable that OS X Yosemite adoption will outpace that of any other previous Mac desktop OS when it is released publicly later this year."
Apple recently released OS X Yosemite Developer Preview 3, and a public version will emerge in September or October, we can expect OS X Yosemite's usage share to grow even further ahead of its launch this fall.