OpenZFS on OS X
OpenZFS on OS X
1.5.2

4.5

OpenZFS on OS X free download for Mac

OpenZFS on OS X1.5.2

31 January 2017

Advanced file/volume system supporting very large data stores.

Overview

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. OpenZFS is an outstanding storage platform that encompasses the functionality of traditional filesystems, volume managers, and more, with consistent reliability, functionality and performance.

Note: While the included package installers require OS X 10.8 or later, compiling OpenZFS on OS X from source will ensure compatibility with OS X 10.6.

What's new in OpenZFS on OS X

Version 1.5.2:
  • New upstream checksums (with new feature flags): SHA-512, Edonr, Skein (OpenZFS)
  • Resumable send and receive (OpenZFS)
  • Finder notification thread to refresh sizes across datasets (Jorgen Lundman)
  • SPL: enhanced kmem pressure system (rottegift)
  • SPL: Rewrite TSD using AVL tree (Jorgen Lundman)
  • Cache names in getattr (Jorgen Lundman)
  • InvariantDisks serial fixes (cbreak)
  • Show Hardlink LinkID fixes (Jorgen Lundman)
  • Trivial ACLs not hidden (Jorgen Lundman)
  • Group ACL fixes (Jorgen Lundman)
  • IOkit deadlock on export fixes (Jorgen Lundman)
  • MAF and deadlocks in ZVOL fixes (Jorgen Lundman)
  • Show diskutil info on ZVOLs fix (Brendon Humphrey, ilovezfs)
  • ZED notification fixes (Andreas Weinlein)
  • Have automatic import always use by-id (Justin Scholz)
  • Fix handling of XATTR_CREATE and XATTR_REPLACE (ilovezfs)
  • Don't ignore VFS when it passes nosuid and nodev (ilovezfs)
  • Don't use a shared lock for online expansion (ilovezfs)

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How would you rate OpenZFS on OS X app?

10 Reviews of OpenZFS on OS X

Hoondi
02 August 2014
Version: 1.3.0

Most helpful

I would like to share my thoughts with others and welcome feedback. I have used ZFS before it appeard on OSX and used it on OSX since 32bit PPC days... The first thing to keep in mind, is that there's been several attempts to kickstart this filesystem on OSX and even Apple intended to use it before Oracle bought out Sun Microsystems. These attempts are not a reflection of ZFS's features itself, but more so an issue of execution on the Mac OS X platform. Articles exist on the web that suggest once you starting reading around 12TB of data on spindles, you're statistically guaranteed to have encrounted a read error. (http://www.zdnet.com/blog/storage/why-raid-5-stops-working-in-2009/162). This is also known as silent data corruption, bit creep etc etc. The merit of the article or how accurate the "12TB" value actually is, isn't really something that should be discussed here, but the message is clear – the larger hard-disks become, the more likelihood read errors will occur when you read/copy the data. Think about his for a second: How often do you replace your storage? let's conservatively say every 5-7 years. (some only do it if a disk fails) And how long do you propose to live? let's say the "y" generation is going to reach 80+ no probs. So, if you transfer your data every 5-7 years, that's 12 occasions (minimum) of migrating/copying your data throughout your life. How confident are you that all your data will still be readable when you want to hand down photos of loved ones or movies of your children? If you're not storing your data that can be guaranteed consistent-on-disk by using block checksums, you may want to rethink a few things. Also, what I'm talking about here has nothing to do with backup strategies – that's another topic for discussion another time, but realise that if you cannot guarantee consistency-on-disk, all you're doing is potentially moving a hidden problem to your backup strategy. This all sounds fairly drastic and harsh, and this issue is essentially masked by current disk sizes, but with 6TB drives available, it's something you might want to carefully consider for the future. Being able to use checksums to verify your data is just one of the many features of ZFS, there are many more that no other filesystem can offer natively on OS X and so it's for this alone that I rate ZFS so highly. HFS is should've been retired years ago, (http://arstechnica.com/apple/2011/07/mac-os-x-10-7/12/) Even Apple know this by there decision to adopt ZFS back when Mac OS X 10.5 was being developed. How do you feel about your data sitting on HFS now? Hat's off to the guys developing ZFS on OSX, you guys rock! Regards, R.
(6)
3
Aargl
17 November 2018
Version: 1.5.2
Current version is 1.8.2. Time for a small review. After nearly 4 years using OpenZFS, my early enthusiasm has waned... All in all, knowing how it has evolved, I kind of regret a bit my installing it. Not that ZFS has become a bad filesystem, but the development of the Mac port is really slow in fixing the issues, the devs don't have much time to dedicate to that project and you must make enough trials before updating to a new version. I had to skip a few versions last year before they fixed an important issue I had (took one and a half year before I can update with peace of mind...) — I don't even dare posting issues on their forum any more, as one dev has been pretty rude to me a few years ago, with no reason (see one of my posts below) and I generally get no answer. Luckily, the issues have always been non-destructive, and once you've got a version that works it's ok. I want to believe that if you dedicate a full disk to one big ZFS pool, you'll meet zero issue. But having a few pools scattered amongst HFS+ partitions like me is probably showing issues that wouldn't arise otherwise — and this is an issue for me, as ZFS is still not bootable, AFAIK. Well, I'm probably not the target for ZFS, after all, even though I can't update to MacOS 10.13 and enjoy APFS... So, if you absolutely need ZFS or are of the geek kind (like me ;-) ), go for it, but now that APFS is here, there's no need for ZFS for the average user.
(2)
Aargl
11 February 2017
Version: 1.5.2
v1.6.1 is out and still compatible from 10.8 to 10.12.
(I've tested it on 10.9 and all seems ok)
(0)
Show comments (3)
5
persecutor
01 February 2017
Version: 1.5.2
Great job guys, keep it up!
(0)
Aargl
31 January 2017
Version: 1.5.2
v1.5.2 have been out a long time ago and is perfectly stable; there's actually a "1.6.0 Sierra RC1" available, but as its name implies, it might only run under Sierra... wait and see. You can read in their forum that sooner or later (will it be 1.6?) OpenZFS will be bootable, which should be really interesting. ;-)
(0)
Aargl
23 October 2015
Version: 1.3.1
Current version is 1.4.5.
(1)
Aargl
23 October 2015
Version: 1.3.1
A quick note after recent changes in their support policy: I had a mail from one of the devs saying "We have reached a point of overload in terms of supporting people with issues such as yours in the forums, and they have reached a point of disarray, bordering on disinformation. i.e. There are people out there who believe the software cannot be installed because you, and I mean specifically you cannot do so due to whatever circumstances you find yourself in."
Then "You have to realize that there are only 3 of us running this project, it costs you nothing to use the software, so we feel quite justified in dictating in what form we will attempt to deliver support."

So, I suppose it means that if you dive into ZFS, you have to be tech savvy enough to be sure that your issues are general issues... and not pollute the forums. ;-)
Good will is not enough, it seems.
Even if I understand the overflow they must face, that behavior put off my enthusiasm (to say the least...), especially because earlier this year I faced "real" issues that have been fixed thanks to the time I've spent trying fixes and communicating with the team — so I don't recognize myself in the portrait of "stupid user" thrown at me. ;-)

To conclude in a positive way, I must say that after ten months or so on ZFS, I had no issue at all regarding data security: mine were compatibility issues with specific softwares (indeed AVID ProTools and their interface drivers). Fixed.
Once it's all set up, you can just use ZFS partitions as any other (you can even manage them with Carbon Copy Cloner — not Superduper!).
Nevertheless, there are things to know before jumping in: it still doesn't support OSX permissions. I still have one issue, exclusively with ProTools wiping labels off its own sessions files (a really small issue, indeed, considering that all the other softwares I've tried aren't doing so).
(0)
4.5
Aargl
05 February 2015
Version: 1.3.1
It doesn't take long to "feel" the superiority of ZFS over HFS: a few speed tests on copying huge files reveal faster writing and, if you activate compression, a space gain (a 37 Gb HFS became 35.4 Gb ZFS!) — it's actually even faster with compression on! Of course, the scope of ZFS is rather on data security, but I can only rely on what I've read, since it's just been 2 weeks I'm testing it (indeed because I discovered hundreds of bad blocks on an HFS drive... ;-) ). The principles behind ZFS are pretty reassuring: "copy-on-write", self-repairing mirrors... And the OpenZFS dev team is really responsive! I only give 4.5 stars, just because it's not fully integrated in OSX (no GUI, DiskUtility.app and other utilities don't deal with it directly and you will have to use Terminal for setting up and managing "pools"). Yet, it's very easy to create simple pools, and once you understand the concepts of it, you easily create a ZFS partition on your HFS drive without any issue. If you care about your data, ZFS is mandatory.
(0)
Show comment (1)
5
Macott
04 August 2014
Version: 1.3.0
I have been running this since the day Mavericks came out on a production system (before that on a virtual machine for test purposes). At this point I'd recommend it to anyone who wants to benefit from the advantages of running zfs. It is rock solid, and has all the niceties that one would expect (installer, disks automatically mount). It provides "zvols", which means you can have a zfs block device with all the zfs fun stuff (snapshots, auto healing, ...), and format it as HFS+. I'm using that to have TimeMachine backup to zfs.
(1)
Show comments (3)
Strob
02 August 2014
Version: 1.3.0
The developer's website states "It's compatible with OS X 10.6 through OS X 10.10 (Snow Leopard, Lion, Mountain Lion, Mavericks, and Yosemite). " Why is this marked here as needing OS X 10.8 and above?
(0)
Show comments (2)
Hoondi
02 August 2014
Version: 1.3.0
I would like to share my thoughts with others and welcome feedback. I have used ZFS before it appeard on OSX and used it on OSX since 32bit PPC days... The first thing to keep in mind, is that there's been several attempts to kickstart this filesystem on OSX and even Apple intended to use it before Oracle bought out Sun Microsystems. These attempts are not a reflection of ZFS's features itself, but more so an issue of execution on the Mac OS X platform. Articles exist on the web that suggest once you starting reading around 12TB of data on spindles, you're statistically guaranteed to have encrounted a read error. (http://www.zdnet.com/blog/storage/why-raid-5-stops-working-in-2009/162). This is also known as silent data corruption, bit creep etc etc. The merit of the article or how accurate the "12TB" value actually is, isn't really something that should be discussed here, but the message is clear – the larger hard-disks become, the more likelihood read errors will occur when you read/copy the data. Think about his for a second: How often do you replace your storage? let's conservatively say every 5-7 years. (some only do it if a disk fails) And how long do you propose to live? let's say the "y" generation is going to reach 80+ no probs. So, if you transfer your data every 5-7 years, that's 12 occasions (minimum) of migrating/copying your data throughout your life. How confident are you that all your data will still be readable when you want to hand down photos of loved ones or movies of your children? If you're not storing your data that can be guaranteed consistent-on-disk by using block checksums, you may want to rethink a few things. Also, what I'm talking about here has nothing to do with backup strategies – that's another topic for discussion another time, but realise that if you cannot guarantee consistency-on-disk, all you're doing is potentially moving a hidden problem to your backup strategy. This all sounds fairly drastic and harsh, and this issue is essentially masked by current disk sizes, but with 6TB drives available, it's something you might want to carefully consider for the future. Being able to use checksums to verify your data is just one of the many features of ZFS, there are many more that no other filesystem can offer natively on OS X and so it's for this alone that I rate ZFS so highly. HFS is should've been retired years ago, (http://arstechnica.com/apple/2011/07/mac-os-x-10-7/12/) Even Apple know this by there decision to adopt ZFS back when Mac OS X 10.5 was being developed. How do you feel about your data sitting on HFS now? Hat's off to the guys developing ZFS on OSX, you guys rock! Regards, R.
(6)
Show comments (2)
Free

4.5

App requirements: 
  • Intel 64
  • OS X 10.9.0 or later

Downloaded & Installed 3,258 times

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