The April 2013 release of MacZFS is stable, but lacks the feature set that's associated with OpenZFS …
ZFS-OSX brings OpenZFS features to MacZFS.
 is a well-developed alpha that is ready for testing by people who are happy to use Terminal. It's designed for use with Mac OS X 10.6 – OS X 10.9 (Snow Leopard, Lion, Mountain Lion and Mavericks).
To begin testing the most recent build
ZeroBSD | OS X with ZFS offers an approach to obtaining the most recent code, building from that code and installing the built software.
To test without building
Disk images are ocasionally added to http://lundman.net/ftp/osx.zfs/ – aim for the most recent .dmg file. The image will contain built software – binaries, kernel extensions (KEXTs) and so on – that may be used with or without installation.
These images are not designed to include the most recent fixes or enhancements. If in doubt, please ask in IRC:
Suggested focus areas for testers
A ZFS file system for your home directory
- where ~ is the root of that file system.
A ZFS file system containing multiple home directories.
ZFS-OSX is not yet feature-complete.
Alpha software should not be used with data that is of significant value. Be thorough with your backups and please remember that ZFS alone is not a substitute for a good backup strategy.
If you're limited to Leopard, or if you require the most stable MacZFS at this time, then instead of ZFS-OSX: consider relatively old version 74.3 of MacZFS.
If you normally use MacZFS 74.3 or ZEVO:
- you must uninstall that software before testing ZFS-OSX
- you must uninstall ZFS-OSX before reverting to ZEVO or MacZFS 74.3