ZFS to become file system in Leopard

Sun's Jonathan Schwartz announced today at Sun event in Washington D.C. that Apple would be making ZFS "the file system" in Mac OS 10.5 Leopard

Rumors of Apple's interest in ZFS began in April 2006, when an OpenSolaris mailing list revealed that Apple had contacted Sun regarding porting ZFS to OS 10. The file system later began making appearances in Leopard builds.

ZFS has a long list of improvements over Apple's current file system, Journaled HFS+. More information on ZFS is available at the ZFS homepage and Wikipedia.