The install base of Mac is 50 million. http://www.boygeniusreport.com/2010/10/20/apple-cfo-tim-cook... There are about 9 million programmers in the world (heard this from Joel at BoS 2 weeks ago -- not sure if it's true, or if I am remembering correctly). If 50% of devs have a mac (way overestimate), we make up less than 10% of the users. Now ... how many of us need Java?