Fresh install HS questions

Discussion in 'Mac Pro' started by mgmtm3, Nov 9, 2018 at 12:27 PM.

  1. mgmtm3 macrumors member

    Joined:
    Nov 12, 2016
    #1
    I'm unfortunately selling my Mac Pro 5.1. It current has a MacVidCards GTX 1080 in it so I want to keep it on High Sierra for the new buyer. Is there a way I can fresh install High Sierra without going to Mojave where there is no Nvidia driver out yet?
     
  2. fhturner macrumors 6502

    fhturner

    Joined:
    Nov 7, 2007
    Location:
    Birmingham, AL & Atlanta, GA
    #2
    Are you intending to install on the same disk you're running from now? If so, what type of disk, and if SSD is it formatted as APFS? I may be overthinking things here, but if it is APFS and you're trying to fresh install the same, this might work:

    1. Create a new volume w/in the APFS container.
    2. Download the full macOS 10.13 HS installer from here.
    3. Install to the new volume.
    4. Reboot onto your old volume and install the Nvidia driver to the new install (not sure if it will let you choose a different volume or not tho...)
    5. After you're all done, boot into Recovery mode and delete your non-fresh boot volume (but I don't believe this will work unless you swap in a different video card...somebody else chime in?)

    Again, I've probably overthought it, and I'm not 100% on that process, but it may be a starting point that would work. If you can slap in a temporary disk to run from and wipe the one you're selling with it, that might help too.
     
  3. mgmtm3 thread starter macrumors member

    Joined:
    Nov 12, 2016
    #3
    So the 1080 is flashed so I do have boot screens and all. So booting into recovery should not be a problem. I have two hard drives, one is for MacOS on APFS and the other is a bootcamp volume. Could I possibly format the windows copy and install it on that disk and then just format the original MacOS volume and make it extra storage?
     
  4. skizzo macrumors member

    Joined:
    Apr 11, 2018
    #4
    make a USB installer. then wipe the drive and install HS via the USB installer
    --- Post Merged, Nov 9, 2018 at 12:49 PM ---
    Yes, this is a good route to take to do what you are looking to do
     
  5. fhturner macrumors 6502

    fhturner

    Joined:
    Nov 7, 2007
    Location:
    Birmingham, AL & Atlanta, GA
    #5
    Yeah, I was considering that you would have the boot screen, but I believe the Recovery Mode uses actual OS drivers, so I'd worry about not being able to see that w/ the 1080. A quick check would prove me wrong or confirm tho.

    Yes, your plan should work. Once you get the Windows volume wiped and HS installed, boot back into your current partition to try to install those Nvidia Web drivers, then boot to Recovery Mode if you can to wipe the current drive out.

    Or just wipe, partition, and use the much faster internal disks instead...
     
  6. mgmtm3 thread starter macrumors member

    Joined:
    Nov 12, 2016
    #6
    I also don't think USB install works with the 5.1. Could be wrong though. Ill try out the disk swap method tonight.

    edit: Thanks for the quick replies!
     
  7. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #7
    For flashed GTX1080, boot to recovery mode, format all partitons, and re-install MacOS should be very simple.

    If your current OS is High Sierra, it will only re-install High Sierra for you.
     
  8. orph macrumors 65816

    orph

    Joined:
    Dec 12, 2005
    Location:
    UK
    #8
    USB install works fine, always has been doing it since well since iv had a cmp3.1.

    GL
     
  9. DearthnVader macrumors 6502a

    DearthnVader

    Joined:
    Dec 17, 2015
    Location:
    Red Springs, NC
    #9
    The cMP can boot USB GPT disks, it just can't boot legacy MBR usb disks. At least not that I've been able to do.
     

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