WWDC rumours begin - is ZFS the new true Mac way? Apple collects secrets like a pack rat collects shiny things. It's part of the company's culture. So when someone breaks the code of silence, it sets virtual seismographic needles scratching. That happened this week, when Sun Microsystems CEO Jonathan Schwartz said Apple's upcoming Mac OS X 10.5 Leopard, would rely on a file system that engineers at his company have spent years creating: ZFS.