Install To External SSD?

Discussion in 'macOS Mojave (10.14)' started by PBG4 Dude, Jun 5, 2018.

  1. PBG4 Dude macrumors 68030

    PBG4 Dude

    Joined:
    Jul 6, 2007
    #1
    I’ve tried to install Mojave to an external SSD multiple times but keep ending up with the circle with a slash through it icon instead of booting.

    Has anyone installed to an external SSD successfully? I have an Apple (Toshiba) OEM 128GB SSD in an external closure and have never had issues installing an OS on it before Mojave. Even reinstalled High Sierra to external then booted that version of High Sierra to upgrade. Still no luck.

    Installing to a Parallels image now to see if this will work for me. No way am I installing beta 1 to my internal SSD.

    Oh yeah, this is on a 2017 15” MBP so it should be compatible.
     
  2. keysofanxiety macrumors G3

    keysofanxiety

    Joined:
    Nov 23, 2011
    #2
    Could it maybe be APFS issue? Not sure if Mojave is that only but possibly you need to format the external SSD as APFS rather than HFS + /MacOS Extended Journaled?

    Just guessing as I'm not sure if you can even format external drives as that but worth a go if so!
     
  3. PBG4 Dude thread starter macrumors 68030

    PBG4 Dude

    Joined:
    Jul 6, 2007
    #3
    I formatted as APFS after my initial try on HFS+ failed.

    Edit: It’s even running on the external in a Parallels container now. Just can’t get it to install directly.
     
  4. c-3po macrumors newbie

    Joined:
    Jan 10, 2018
    Location:
    Europe
    #4
    Today I installed Mojave on an external SSD sitting in an OWC USB3 housing and it worked fine. The drive was formatted to HFS+ but was reformatted as APFS during install. Thats with an iMac i7 Late 2012. How is your SSD connected to the Mac? Does the drive get enough power?
     
  5. PBG4 Dude thread starter macrumors 68030

    PBG4 Dude

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    Jul 6, 2007
    #5
    SSD is connected directly to MBP via USB-C cable. Was able to install Mojave to a parallels VM file on the external SSD without issues.

    This is an SSD I’ve used for years to test beta OSs and still works on High Sierra. I even tried a different USB3 HDD to see if that would make a difference.

    Tried different ports on the MBP and everything. Have no idea why it won’t work. I’ve even redownloaded the install image in case the first download was corrupted. Just can’t figure it out.
     
  6. c-3po macrumors newbie

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    Jan 10, 2018
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    Europe
    #6
    Wow, sorry to hear that. I am running out of ideas I am afraid.
     
  7. PBG4 Dude thread starter macrumors 68030

    PBG4 Dude

    Joined:
    Jul 6, 2007
    #7
    Thanks for trying. :)

    Just don’t know what to try next, other than wait for beta 2. While Mojave runs in Parallels, it can’t see the touchbar and other hardware.
     
  8. MIKX macrumors 6502a

    MIKX

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    Japan
    #9
    So Mojave doesn't ask you if you want to re-format to APFS ?

    If so, bad news for HFS+ which although old .. works and is reliable. APFS is new and problomatic at least in Hi Sierra.
     
  9. PBG4 Dude, Jun 6, 2018
    Last edited: Jun 6, 2018

    PBG4 Dude thread starter macrumors 68030

    PBG4 Dude

    Joined:
    Jul 6, 2007
    #10
    So, the external SSD that won’t boot on my 2017 MBP is currently working as expected when using it with my 2012 MBA. Now I’m really confused. Didn’t reload it or anything. Just connected to my MBA and held down Option on boot to select it.

    Going to retry the external drive on my MBP again once Mojave setup has completed on my MBA to see if it’ll boot my MBP at that point.

    Edit: did not boot the MBP even though it will boot the MBA. Very weird.
     
  10. Frippefrippe macrumors newbie

    Joined:
    May 11, 2015
    Location:
    Stockholm
    #11
    Check your USB-C to USB-C cable. I had the same problem after installing MacOS 10.14 and noticed that my original Samsung SSD T3 cable was broken. Tried another and now I am typing this in Safari 12.0 on Mojave installed on an external drive.
     
  11. PBG4 Dude thread starter macrumors 68030

    PBG4 Dude

    Joined:
    Jul 6, 2007
    #12
    I used the same USB-A cable that worked with the 2012 MBA just in case the USB-C cable was the issue. I also used a different cable + different external drive with the same result.

    I am perplexed. I'm not sure what else to try.
     
  12. BenAndJerry macrumors newbie

    Joined:
    Jun 6, 2018
    #13
    I am having the exact same issue as PBG4 Dude, I'm also getting that circle and slash icon when booting Mojave from an external SSD. I'm also on a 2017 MacBook Pro. From reading this thread, my guess is it has to do something with USB-C type MacBooks. I tried booting while holding down Cmd + V to see what's going wrong. There I'm getting an
    USBHostDevice::setConfigurationGated: compliance violation: failed to enable remote wake
    error. Not sure what it means, but I guess we'll have to wait for the next beta and hope they fixed it there.
     
  13. PBG4 Dude thread starter macrumors 68030

    PBG4 Dude

    Joined:
    Jul 6, 2007
    #14
    Good to know you and I are not alone! :)

    I will try verbose boot and report back my results. I did notice my external USB enclosure light blinks in a way I've never seen it blink before when trying to boot Mojave.

    (Hope this bug doesn't mess up your ice cream production.)
     
  14. sprintsucks, Jun 6, 2018
    Last edited: Jun 6, 2018

    sprintsucks macrumors newbie

    Joined:
    Oct 14, 2011
    #15
    I get the same error on a 13" Mid 2014 MacBook Pro. It's a simple USB 3.0 flash drive: https://www.sandisk.com/home/usb-flash/ultra-fit-usb

    EDIT: It's the drive. Try a different drive. I tried it on another external HDD partitioned in APFS and it works just fine. I've had issues with the Sandisk flash drive even when booting Ubuntu..
     
  15. PBG4 Dude thread starter macrumors 68030

    PBG4 Dude

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    Jul 6, 2007
    #16
    I tried a different drive plus this SSD successfully booted Mojave when I connected it to my 2012 MBA.

    Using verbose mode, the boot process hangs at “HID: shim level 2” on my MBP. Have no clue what that means. I think HID means Human Interface Device.
     
  16. TimothyR734 macrumors 6502a

    TimothyR734

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    Logsden Oregon
    #17
    do you have a external mouse connected to your MBP
     
  17. SoyCapitanSoyCapitan macrumors 601

    SoyCapitanSoyCapitan

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    SELL $BTC
    #18
    macOS hasn't been playing nicely with some external enclosures. It might be that the drive didn't get blessed during install. Please report it as a bug.
     
  18. macsba macrumors 6502

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    Next to my Mac.
    #19
    I have an external SSD connected to my MBPr (mid 2012). I installed Mojave on it without any problems. Prior to the install, the SSD was used for the High Sierra beta testing. Last macOS install before the Mojave installation was the first beta of 10.13.6. The SSD was already formatted in APFS. One thing I did notice, after the first boot into the installation process, the screen was blank for nearly 10 minutes. The SSD is connected to the MBP via USB 3.0 cable.
     
  19. kemo macrumors 6502a

    kemo

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    #20
    that's good to know! I'll give it a try today.
     
  20. PBG4 Dude thread starter macrumors 68030

    PBG4 Dude

    Joined:
    Jul 6, 2007
    #21
    No, only power and the external drive. That’s why I find the HID mention weird.
    --- Post Merged, Jun 7, 2018 ---
    I tried two different ones. Even after making a bootable Mojave on my 2012 MBA it wasn’t recognized by my 2017 MBP. So it boots on my 2012 but not my 2017.

    Planning to file a bug report today. Just wanted to give it a couple more tries to see if I could fix it, but still no joy.
     
  21. TylerL macrumors regular

    Joined:
    Jan 2, 2002
    #22
    For the record, I'm able to boot Mojave on a USB3 SSD.

    My recipe:
    1: High Sierra system on internal SSD block-cloned to external USB SSD
    2: Ran "Install macOS 10.14 Beta.app" with the USB SSD as the target
    3: There's no step 3

    YMMV, but this worked perfectly fine on my Mid-2012 MacBook Air.
     
  22. BenAndJerry macrumors newbie

    Joined:
    Jun 6, 2018
    #23
    I was wondering if anybody got Mojave to run on an external drive with a USB-C type MacBook (i.e. a 2015 or newer MacBook, or a 2016 or newer MacBook Pro)?
     
  23. Julien, Jun 9, 2018
    Last edited: Jun 9, 2018

    Julien macrumors G4

    Julien

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    Jun 30, 2007
    Location:
    Atlanta
    #24
    I have a Mac mini with a USB 3 dock/SSD that ran High Serra and I just updated/installed Mojave over it. Didn't think anything about it until I saw this tread but it worked fine for me.

    EDIT: Was HFS+ on High Serra and was reformatted to APFS with Mojave.
     
  24. roziek macrumors regular

    roziek

    Joined:
    Jun 24, 2017
    #25
    Works fine for me, too. Installed it on the very first day beta 1 hit, on an external Crucial 128GB SSD in a USB 3 enclosure. Drive was formatted as HFS+, and was reformatted to APFS during installation.
     

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