According to rumbles on the internet, the ZFS team at Sun has been contacted by Apple’s Filesystem Development Manager to make headway with a port of ZFS to Mac OS X.

Wikipedia description of ZFS:

ZFS is notable for its high capacity, integration of the previously separate concepts of filesystem and volume management into a single product, novel on-disk structure, lightweight filesystems, and easy storage pool management.

ZFS is a 128-bit file system, which means it can provide 16 billion billion times the capacity of current 64-bit systems. The limitations of ZFS are designed to be so large that they will never be encountered in any practical operation. When contemplating the capacity of this system, Bonwick stated “Populating 128-bit file systems would exceed the quantum limits of earth-based storage. You couldn’t fill a 128-bit storage pool without boiling the oceans.”

It is unknown right now what Apple’s plans are for ZFS, Mac OS X currently makes use of HFS+ filesystem.