The operating system OS X Yosemite newly released by Apple proved very attractive to Mac users. In the span of six days, the rate of adoption has managed to step over its predecessor OS X Maverick.
Based on data released by Chitika, as reported by Ubergizmo, Monday 27th of October 2014, when Maverick was released last year, after 6 days of adoption reaches 12.4% of all Mac users. The percentage was much higher than Mountain View formerly adopted only by 5.6% of users.