Apple says it is seeing a large number of UNIX, Java and Open Source developers migrating to Mac OS X. “Over the last three years, people who have experience in those areas are showing a great interest in our OS,” Apple VP of Worldwide Developer Relations Ron Okamoto told “We’re seeing a lot of first timers. It’s really impressive.” For those developers, Apple’s Worldwide Developers Conference offers some 200 sessions including categories such as Enterprise IT, Hardware Technologies, and OS Foundations. “This is a change from last year with our focus on enterprise and IT,” Okamoto said. “One of the things we’re doing is adding content and laboratories with more education. We’re adding to our tools space including an update of our Xcode development tool.”