updated 04:25 pm EDT, Fri October 23, 2009
Company may be working on its own alternative
Despite previous efforts to bring support for the ZFS file-system to Mac OS X, Apple has dropped the project. Sun Microsystems CEO Jonathan Schwartz several years ago publicly claimed Leopard would utilize ZFS instead of HFS+, although Apple only provided limited support for the new technology. Even the read-only functionality was dropped with the transition to Snow Leopard.
Daring Fireball blogger John Gruber speculates the decision may have been based on legal hurdles rather than development difficulties. Sun was recently acquired by Oracle, although Apple has not yet provided a detailed explanation regarding why the project was stopped.
Gruber also suggests Apple is currently developing a its own alternative to be used in future revisions of OS X. The company has yet to formally announce a project, although a file system engineer is sought in the job listings.