Originally posted by marmotton
There are 2.5 million Mac OSX users out there. This is what Steve Jobs said during the keynote, including that they had several means of triangulating that number and they all point to the same estimate.
One funny thing, though: he also said that there had been 4 million iPhoto downloads. iPhoto being a MacOSX-only application, there may be even more MacOSX users out there, or some users downloaded that application multiple times (from different computers)... Go figure.
So at least 2.5 million Mac OSX users, which they consider to be 20% of the Mac users, which brings the Mac user size to 12.5 million... Not bad.