Startup Disk Update?!

Discussion in 'Mac mini' started by DRDR, Dec 8, 2018.

  1. DRDR macrumors regular

    Joined:
    Jul 23, 2008
    #1
    I am booting macOS on a 2018 Mac Mink from an external Thunderbolt NVMe drive setup. From time to time a message pops up, saying that the startup disk software has to be updated. After this update process the boot continues as usual.

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    What exactly is going on here? And why does it happen more than once?
     
  2. DeltaMac macrumors G3

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #2
    I suspect that message is related to the T2 security on a 2018 mini.
    Can you post a screen shot of that message, or at least word-for-word, as it shows on the screen?
     
  3. DRDR thread starter macrumors regular

    Joined:
    Jul 23, 2008
    #3
    " A software update is required to use this startup disk." Then you can click on the "Update" button and it starts the update process (like firmware update).
     
  4. DeltaMac macrumors G3

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #4
    Maybe you could turn off the T2 security?
    More info: https://support.apple.com/en-us/HT208330

    I see that you made that external boot drive prior to getting the 2018 mini. Did you just plug it in to the new Mini, and it works, other than the startup disk message?
    I suspect that a better fix will be reinstalling the macOS system. If you have a bootable Mojave installer, boot to THAT, and reinstall the system on your external. It won't delete anything, but a reinstall SHOULD fix your boot issues by verifying that the external is in APFS format. That should be a good fix. Double-check after that reinstall that your Startup Disk has the correct boot volume selected.
     
  5. DRDR thread starter macrumors regular

    Joined:
    Jul 23, 2008
    #5
    Yes, it is an old installation and it just worked. Security is already disabled in the T2 settings.

    Do you know what exactly is being updated in the process?
     
  6. astrorider macrumors 6502

    Joined:
    Sep 25, 2008
    #6
    I’m not sure what it’s doing, but I saw this a couple times when I was first setting up my mini which uses an external boot drive from my old computer. I let it update each time and haven’t seen it again since.
     
  7. DeltaMac macrumors G3

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #7
    Do you mean the process of reinstalling the macOS system?
    The reinstall checks everything that is installed, verifies that all system files are present, and in the correct location. Any discrepancies are fixed. Part of that is verifying that the drive format is correct, and valid. THAT should fix your issue, I think.
    What does the reinstall actually update? Everything that needs updating, or replacing. That could be thousands of files, or just one file in the wrong location. It is essentially a "repair" install of the system.
     
  8. DRDR thread starter macrumors regular

    Joined:
    Jul 23, 2008
    #8
    No, I meant what kind of update is done to the startup disk.
     
  9. DeltaMac macrumors G3

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #9
    If your external boot disk is NOT in APFS format, the Mojave install will change the format to APFS.
    (The installer checks the format, and modifies it to APFS. You don't have any control over that. The installer will do that change automatically, and that is likely a fix to prevent that message about updating the software.
     

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8 December 8, 2018