Apple today announced that there are now over 9 million active users of Mac OS X and the company expects to cross the 10 million user mark later this quarter. In addition, the company says there are now over 10,000 Mac OS X applications that run natively on the platform. In terms of sales, Apple announced today that over two million iPods have been sold since its introduction and announced the immediate availability of a new 15GB model for US$299.