We often wonder how many of us there are. While Apple occasionally shares the number of active Mac OS X users, it has been a while since the last update. Eight months ago in August 2006 at Apple's Worldwide Developers Conference, Steve Jobs said there were. Keith Bachman, an analyst at Bank of America Securities, now quotes a higher number in : 22 million users of all versions of Mac OS X. Bank of America Securities estimates an increase of 6 million Mac users since the release of Mac OS X 10.4 Tiger in June 2005. It's also highly likely that there are uncounted millions of users still using Mac OS 9 and earlier.