APFS slowing my air? Help revert to old file system.

Discussion in 'MacBook Air' started by elf69, Jan 24, 2018.

  1. elf69 macrumors 68020

    elf69

    Joined:
    Jun 2, 2016
    Location:
    Cornwall UK
    #1
    My 2012 MBA read and write speeds are a lot slower than expected.

    I know the figures are up to xyz but the machine is fast enough but to boot takes same time as my 2010 sata2 SSD MacBook.

    So please could you great folk here guide me thru reverting back to the old file system and high Sierra.

    I will make a TM and will migrate stuff back, there is not a lot as only 64GB SSD.

    I understand I will probably need format drive blank and start over which I'm fine with.

    I hope it will get some speed back.
    Write speed is almost half apples quoted speed and read down fair bit too.
     
  2. Lunder89 macrumors 6502

    Lunder89

    Joined:
    Oct 16, 2014
    Location:
    Denmark
    #2
    As I understand it, High Sierra can only run on APFS. At least as long as you have an SSD. Even if you install on the older HFS+, it will just upgrade it during install.
     
  3. elf69 thread starter macrumors 68020

    elf69

    Joined:
    Jun 2, 2016
    Location:
    Cornwall UK
    #4
    APFS is not compatible with TM I read and although not yet set up I do use TM as backups.

    I need read up more about reverting.

    but think need a CCC or super duper backup first
     
  4. Lunder89 macrumors 6502

    Lunder89

    Joined:
    Oct 16, 2014
    Location:
    Denmark
    #5
    It is just the time machine backup drive that can't be formatted in APFS. I do backup of 3 Macs with Time machine, all running macOS High Sierra.
     
  5. elf69 thread starter macrumors 68020

    elf69

    Joined:
    Jun 2, 2016
    Location:
    Cornwall UK
    #6
    I read online in few places that some older SSDs perfume better on HFS.

    I think mine may be one and why the read and write speeds are lower.
    of course other reason could be failing/old SSD but all tests say it fine.
     
  6. shafez macrumors member

    shafez

    Joined:
    Jul 3, 2011
    Location:
    Egypt
    #7
    There are 2 solutions introduced in the below links to use HS on HFS+, Hope this help.

    https://forums.macrumors.com/threads/slow-boot.2072585/page-11#post-25578927

    https://forums.macrumors.com/threads/slow-boot.2072585/page-12#post-25753021
     

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6 January 24, 2018