How many Mac users are there?

93.96 million.

W3Counter’™s latest Global Web Stats, published in May 2010, report that the Mac OS X operating system has a 7.83% market share. Taking into account that there must be about 1.2 billion personal computers in use (according to Forrester Research, Inc.), the Mac user population is currently about 93.96 million. In three years, the number of Mac users has nearly doubled.