Given Apples 7.6% share of the 'PC' market as reported in 3Q15 (http://www.gartner.com/newsroom/id/3146617 http://www.gartner.com/newsroom/id/3146617) I wouldn'

Given Apples 7.6% share of the 'PC' market as reported in 3Q15 (http://www.gartner.com/newsroom/id/3146617 http://www.gartner.com/newsroom/id/3146617) I wouldn't be suprised that the vast majority of dropbox users are on Windows, simply because the vast majority of computer users are.