System won't update to newset OS

Discussion in 'Mac Pro' started by darkloki, May 17, 2017.

  1. darkloki macrumors regular

    Jan 26, 2012
    Orange County California
    Guys I'm somewhat stumped on how to update my system. I know this sounds like a noob question, but I'll download the update and the system won't actually install the update and I'm quite lost on how to force my system to revert to the newest OS. My system isn't that old I'm not sure of the model number but it's the 27inch with the Nvidia 750m GT and I'm like 3-4 OS behind.

    Again I just wanna know how to force it to update, Thanks.
  2. jbarley macrumors 68040


    Jul 1, 2006
    Vancouver Island
    Mmmm, 27inch MacPro, I'm not familiar with that model.o_O

    Maybe this question would be better off posted in the iMac forum?
  3. chrfr macrumors 604

    Jul 11, 2009
    Did you download the full macOS Sierra installer from the App Store? Specific details on what exactly you tried, and what exact model of computer and the exact operating system you're currently using would be very useful for others to help you.
  4. keysofanxiety macrumors G3


    Nov 23, 2011
    Any error messages when you try to install the update? There are many things that could cause it to fail. We'll need a little more information.

    Let's start with the obvious and work backwards from there. Run SMART Utility to check the HDD SMART. If it passes, hard-drive's OK and we'll go through additional troubleshooting steps. Otherwise if there's a warning/failing, HDD will need to be replaced so no point even looking towards doing the update until that's resolved.

    SU can be downloaded here:
  5. h9826790 macrumors G5


    Apr 3, 2014
    Hong Kong
    Don't know any 27" Mac in any series has GT 750M. From memory, it only been used on the 2013 21.5" model.

    This model should accept any OS upgrade from Mavericks all the way to Sierra.

    Anyway, with the contradicting info and lack of details, it's really hard to help. But you may have better luck if you post on the iMac or MacOS forum.

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4 May 17, 2017