You could have downloaded OpenZFS on OS X 1.3 for Mac from our application library for free. The software lies within Developer Tools, more precisely General.
From the developer:
OpenZFS on OS X is the open source port of OpenZFS on OS X.
OpenZFS was announced in September 2013 as the truly open source successor to the ZFS project. Our community brings together developers from the illumos, FreeBSD, Linux, and OS X platforms, and a wide range of companies that build products on top of OpenZFS.
You may want to check out more Mac applications, such as MAME OS X, Tutor for OS X Mountain Lion or NTFS for Mac OS X, which might be related to OpenZFS on OS X.
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