according to a post by a Sun employee on the opensolaris.org zfs-discuss mailing list, and previewed screenshots of the next version of Apple's Mac OS X.[15] As of Mac OS X 10.5 (Developer Seed 9A321), support for ZFS has been included, but lacks the ability to act as a root partition, noted above. Also, attempts to format local drives using ZFS are unsuccessful; this is a known bug.[16]