What you need to know about transitioning to APFS in macOS High Sierra

“Apple in June announced that macOS High Sierra will come with the new Apple File System (APFS) on all supported Macs following its debut on iOS, watchOS and tvOS last year,” Christian Zibreg writes for iDownload Blog.

“It’ll replace the dated HFS+ and users won’t be able to opt-out of the transition to APFS, according to a new support document for system administrator that was published recently on Apple’s website, as first noted Wednesday by The Loop’s Dave Mark,” Zibreg writes. “APFS is the default file system in macOS High Sierra for Mac computers with all flash storage.”

“Whether you’re transferring files to an external device or to another folder on your Mac, the speed differences is going to be very noticeable,” Zibreg writes. “Certain operations such as duplicating a file or getting a folder’s size are practically instantaneous.”

Read more in the full article here.

MacDailyNews Take: Our unification of file system is more powerful a weapon than any fleet or army on earth! We are one people, with one will, one resolve, one cause!

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APFS: What Apple’s new Apple File System means to you – June 24, 2016
APFS: New Apple File System promises more speed, flexibility, reliability – June 17, 2016
The feds’ll hate this: Apple’s new APFS file system ‘engineered with encryption as a primary feature’ – June 14, 2016
Buh-bye HFS+, hello APFS (Apple File System) for macOS! – June 14, 2016
Apple can do better than Sun’s ZFS – October 26, 2009
Apple discontinues ZFS project, turns attention to own next-gen file system – October 24, 2009
Apple’s Mac OS X Snow Leopard Server’s ZFS goes MIA – June 9, 2009


  1. Apple in June announced that macOS High Sierra will come with the new Apple File System (APFS) on all supported Macs…

    NO. Apple made that announcement nearly A YEAR AGO, in September 2016. Apple even included a way to create a test APFS volume with their release of macOS 10.12 Sierra.

    It is so incredibly easy to know this was the case. That word keeps cropping up with regard to modern technology journalism: LAZY.

    It would be more friendly to chalk this error up to the August Effect. But it doesn’t qualify. Very naughty, Christian Zibreg.

    Meanwhile: Expect ALL deep level disk repair and restore utilities to require paid upgrades! I wrote up an brief article stating same here:

    Disk Utilities vs macOS 10.13 High Sierra: Updates Required

    Quoting myself:
    Disk Repair and Recovery Utilities I’ve checked:
    • Alsoft DiskWarrior: No mention of 10.13 High Sierra on their website.*
    • Micromat TechTool Pro: No mention of 10.13 High Sierra on their website.
    • Prosoft Engineering Drive Genius and DataRescue: No mention of 10.13 High Sierra on their website.
    • 508 Software (CleverFiles) Disk Drill (Pro): They very kindly have provided a webpage describing their current work on updating their software for High Sierra HERE. Thank you!
    • MacWare DiskTools Pro: Abandonware. I’d personally advise tossing it into the trash.

    I received a reply comment from Micromat who have stated:
    …We never release an update with new OS compatibility until *after* the OS update is released, as Apple sometimes makes last minute changes.

    Also, note that APFS is still in development, and Apple has yet to release a spec to developers, which will delay full APFS support from third-party utility makers. Nonetheless, basic APFS support in MacCheck should be available shortly after 10.13 is officially released.

    I’ve verified that this is indeed the case, as per Apple’s statements at their developer website:

    Apple File System Guide: Introduction

    Important: This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

    IOW: For a number of weeks after the official release of macOS 10.13 High Sierra, the ONLY disk utility we’re going have to repair 10.13 volumes is Apple’s own Disk Utility. I find that to be of considerable concern. It’s a motivator to WAIT to upgrade Macs to 10.13, IMHO.

  2. For owners of Macs with HDs that are not compatible with APFS, anybody care to speculate on what we can do to convert our system to APFS? E.g. I have a retina iMac with the standard 1TB fusion drive.

  3. Thanks Derek.

    Since OS 8 (when I got burnt big time) I always wait for a xx.xx.3 to appear before I upgrade as there are usually bugs in the OS. In fact I didn’t go over to OSX until Panther hit the streets (a third release).

    With this upgrade it’ll give the third party software people a chance to get their apps up to date and in line with the new OS. Likewise it’ll also give me a chance to see what software IS being updated and what becomes abandonware.

    However I do appreciate the brave souls on this site who take the plunge early as their feedback is critical in creating a knowledgebase about an OS and related software.

    As is always the case, the choice is yours and yours alone.

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