APFS Conversion Requires a reformat?

Discussion in 'macOS High Sierra (10.13)' started by blahbrah, Jun 6, 2017.

  1. blahbrah macrumors 6502

    Nov 9, 2006
    Hi everyone,
    My 2016 MBP has some weird hiccups in it so I want to try doing a clean install of macOS again, but I was wondering if converting to APFS required a complete reinstall of everything. I'm inbetween jobs right now so I have the time to do a clean install of everything, but hopefully by the time High Sierra comes out I'll be too employed to do a clean install.
  2. chrfr macrumors 604

    Jul 11, 2009
    No, a reformat shouldn't be required. I assume there may be bugs in this first preview but I converted 2 different MacBook Airs (2011 and 2012) to APFS without reformatting and without data loss.
  3. Strelok macrumors 6502a


    Jun 6, 2017
    United States
    I didn't have to do a reformat, it just updated it before installing High Sierra.
  4. mszilard macrumors member

    Oct 16, 2012
    Did somebody try to convert a fusion drive to apfs?
  5. bradhs macrumors member

    Jun 5, 2010
    Also curious if you can convert AFTER you have upgrade to 10.13.
  6. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

    Aug 5, 2001
    Since HDDs will not per default be converted to APFS, I assume it will be an option upon install for SSDs.
  7. pommie82 macrumors 6502

    Jan 4, 2011
    i had no choose then to reformat my mac mini and now i am left with unable to install the operating system at all tried doing a time machine back up that never worked at all because i have changed the file format

    i'am glad i have another machine with no beta on and it working fine with no problems at all
  8. leman macrumors G3

    Oct 14, 2008
    No, it doesn't, but honestly, do NOT install it on your production machine. Its extremely raw. Same for iOS/watchOS.
  9. xgman macrumors 601


    Aug 6, 2007
    After reading through these threads I wouldn't install this on any machine period. And here I thought the first round of Sierra betas were bad. This is ridiculous. This seems pre-alpha at best. Bugs fine, not show stoppers. jeeze Apple. This doesn't seem at all ready for beta testing yet. Is beta 2 installing any better?
  10. chrfr macrumors 604

    Jul 11, 2009
    There's no beta 2 yet.
  11. leman macrumors G3

    Oct 14, 2008
    This is literally the first dev preview that was released like 2 days ago. Your expectations might be a bit high here ;)
  12. Strelok macrumors 6502a


    Jun 6, 2017
    United States
    It seems to mostly affect those without SSD's. It could be I'm just super lucky though, since I've had zero issues except for maybe some slight hiccups here and there.
  13. mmomega macrumors demi-god


    Dec 30, 2009
    DFW, TX
    No issues on 2013 Mac Pro w/ 512GB SSD
    No issues with 2016 tbMBP w/ 512GB SSD

    I still have several other machines to check but as of now for the most part things are running good.

    Both installs gave the option to check whether to convert to AFPS prior to continuing the upgrade to 10.13

    I always do upgrades first to test for 1-2 weeks of daily use and then perform a fresh install so that I'm able to test when and if some bugs only show their face during a particular install.
    Also I will always do a First Aid in Disk Utility prior to an upgrade and then immediately after an upgrade then a restart.
    I've had instances where incorrect permissions on files prior to upgrading led to stranger problems after.
    I'd like to see Apple implement this as a step in the installer, like a "Perform First Aid on disk" after that comes back good, proceed to install.
  14. grahamperrin macrumors 601


    Jun 8, 2007
    Not of APFS.

    Yes, and no, and some of what's above may be off-topic from HFS-to-APFS ;)

    On one hand: I expect APFS to be reasonably well-developed after nine months or so of public beta testing.

    On the other hand: I never really tested it, so I can't complain.

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