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Open source distributions of OpenZFS are available for the following open source platforms.

(For commercial products, see companies.)



At the core of Mac® OS X® Mountain Lion, which is certified to The Open Group UNIX® 03 standard, are Apple® open source Darwin technologies.


ZFS-OSX brings OpenZFS features to MacZFS.

ZFS-OSX 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).

ZFS-OSX is a port of ZFS on Linux®.




A full general purpose operating system with several specialized distributions.

Debian® GNU/kFreeBSD

Debian® GNU/kFreeBSD is a general purpose GNU distribution for amd64/i386 that uses the FreeBSD kernel, which provides an OpenZFS implementation.

An official Debian release, still using GNU libc and with ninety percent of the same software packages available.

The wheezy stable release:

  • can dual-boot 9.0 (default) or 8.3 kernels of FreeBSD
  • uses pool version 28 (deduplication, raidz3, removable log devices)
  • lacks support for ashift=, and important development tools like DTrace
  • installer supports creation of pools, installing to them, and booting directly from them with GRUB2.

The testing release will be updated with new FreeBSD kernel releases, gaining many OpenZFS enhancements, including support for lz4 compression.



FreeBSD is a general purpose server operating system.



FreeNAS is NAS appliance software.

Commercial support is available for sister product TrueNAS from iXsystems.

FreeNAS Shark Transparent on dark.png


PC-BSD is a workstation/desktop operating system.

Commercial support is available from iXsystems.




The illumos codebase is the foundation for various distributions – comparable to the relationship between the Linux kernel and Linux distributions. The codebase originated as a fork from the last release of OpenSolaris.


OmniOS is a general purpose server operating system.

Commercial support is available from OmniTI.

OmniOS logo.png


OpenIndiana (OI) is a general purpose server operating system.

OpenIndiana logo x1200.png


SmartOS is a specialised type 1 hypervisor platform that is lean enough to run entirely in memory and powerful enough to run as much as you want to throw at it. Provisioning is blindingly fast, thanks to zones and ZFS file system creation. SmartOS is a fundamental component of the Joyent® SmartDataCenter™ (SDC) product.



Since its inception in the 1990s, the Linux operating system has become the most widely used software in the world.


Gentoo provides first-party ZFS on Linux packages to itself and its derivatives.

Gentoo can be automatically optimized and customized for just about any application or need. Extreme configurability, performance and a top-notch user and developer community are all hallmarks of the Gentoo experience.

Derivatives include:

  • Funtoo Linux, which features native UTF-8 support enabled by default, a git-based, distributed Portage Tree and funtoo overlay, an enhanced Portage with more compact mini-manifest tree, automated imports of new Gentoo changes every 12 hours, GPT/GUID boot support and streamlined boot configuration, enhanced network configuration, up-to-date stable and current Funtoo stages, all built using Funtoo's Metro build tool
  • Pentoo, a security-focused livecd
  • Sabayon, which emanates substantially from Gentoo's testing branch.

ZFS on Linux

ZFS on Linux provides self-building packages for Debian, Fedora, RHEL/CentOS/SL, Ubuntu and build instructions for several other distributions.

  • Implemented in the kernel
  • maintained in a code repository that is independent from the mainline kernel.


OSv is a new operating system designed for the cloud. It only runs virtualized, and the only file system it supports is ZFS.

  • Implemented in the kernel
  • ZFS codebase forked from FreeBSD; but planning to move to open-zfs.org upstream ASAP.

Distribution logos used with permission. All trademarks are the property of their respective owners.