xmetienne
Level 1 (18 points)
Mac OS X

Q: How to abort a macOS Sierra Installation

Hi Guys,

Here is a challenging one... I wanted to install macOS Sierra, but for some directory and SSD issues, it refuses to install it, it tells me that there are some issues and can't install it and ask me to chose a start disk or restart... I can't chose the SSD macintosh (D:), but I can for the HD Boot Camp Windows 10 (C:), and when I am restarting it launches the macOS Sierra Installation wizard... Anyone knows how to abort the macOS Sierra Installation and how to I go back to macOS El Captain...

Hardware:

MacBook Pro Mid-2012

Intel i7

2,9 Ghz

16 Gb or Ram

2 Drives with 2 different operating systems (running Boot Camp 6)

  1. SSD 1Tb running Mac El Captain on Machintosh HD (D:)
  2. HDD 750 Gb running Windows 10 Pro on Boot Camp (C:)

N.B.: the HDD with Win10 is located in the original drive location and SSD is located instead of the optical drive in an optical bay SATA HD enclosure.

Running extremely fast and well on the SSD MacOS El Captain (even better then the new Mac Air, MacBook Pro Retina, flash SSD...), but a bit slower on the HDD Win10 but that’s normal…

I have downloaded Mac OS Sierra and started the upgrade to Mac OS Sierra… it starts then stocked and cannot install it… I remember having the same issue with the upgrade from Yosemite to El Captain, brought to a Mac
Genius and sorted it out by swopping the place of the HDD and SSD…

I have tried everything, there is apparently an issue with the directory, severely damaged can’t repair, blablabla… spare you the details I rebooted on the recovery and launched DW (Disk Warrior) tried to fix it but failed… it works on it, rebuilds it, but cannot replace the directory consequently I am stocked and DW tells me to make a backup format the drive and then reinstall… Funnily I am on the HDD on the Win10 Boot Camp, and I can access the D: drive SSD Mac OS and see and access everything even open files Mac files such as docx, xls, pdf… on Win10

 

Well the issue is that I am not in a modern country, I’m in Africa and where I am no Apple Shop, the nearest one is 900 miles away in Nairobi… And I’ve got a lot of work at the moment and can’t afford to lose days without my MacBook Pro... So maybe someone has an idea how to resolve it and up to the challenge...


Looking forward hearing from you guys…


Thanks,

MacBook Pro (13-inch Mid 2012), OS X El Capitan (10.11.6), Windows 10 - Boot Camp 6

Posted on Sep 20, 2016 5:50 PM

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xmetienne

Q: How to abort a macOS Sierra Installation

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  • Helpful answers

  • by leroydouglas,

    leroydouglas leroydouglas Sep 20, 2016 5:56 PM in response to xmetienne
    Level 7 (24,029 points)
    Notebooks
    Sep 20, 2016 5:56 PM in response to xmetienne

    You can quit the installer from the drop down menu.

     

    You can launch it again from the Applications folder:  "Install macOS Sierra.app"

  • by xmetienne,

    xmetienne xmetienne Sep 20, 2016 11:47 PM in response to leroydouglas
    Level 1 (18 points)
    Mac OS X
    Sep 20, 2016 11:47 PM in response to leroydouglas

    Hi there,

    Even by quitting the macOS Sierra installer and then restarting, it doesn't... when rebooting it goes straight back to the macOS Installer...

     

  • by K Shaffer,

    K Shaffer K Shaffer Sep 21, 2016 12:27 AM in response to xmetienne
    Level 6 (14,537 points)
    Desktops
    Sep 21, 2016 12:27 AM in response to xmetienne

    You may be able to start up in Safe mode... this could help if it works

    because it may try to repair the damages to the system it had installed.

    Hold the Shift key down on startup to try to boot in Safe mode. It will

    take some time, and you would be expected to enter your Admin PW

    to get into Safe mode desktop.

     

    • Try safe mode if your Mac doesn't finish starting up - Apple Support

    https://support.apple.com/en-us/HT201262

    Mar 21, 2016 - If OS X finds an issue, the directory on your startup disk is repaired and

    ... is started in safe mode, you can use System Information to check this.


    Another option may be possible, to start & see the Startup Manager...

    If you can quit the installer and see if it will restart with the Opt key held

    down, the Mac should try & start in older system. The Startup Manager

    would appear to help you select a start volume. (see 'hidden startup' link

    page for images about this idea, below.)


    • How to troubleshoot your mac with these hidden startup options:

    http://www.howtogeek.com/189104/troubleshoot-your-mac-with-these-hidden-startup- options/


    OS X Recovery can be used to troubleshoot, repair and reinstall another

    OS X from your previous systems history with that machine. This varies

    depending on what you had installed, and the OS X it first shipped with.


    • About OS X Recovery - Apple Support


    You could try to start up in OS X Recovery. Even more helpful, if you had

    an external drive with Time Machine files, backed up timely & available.


    • Apple OS X and Time Machine Tips:

    http://www.pondini.org/OSX/Home.html


    Because you would have to quit the installer and restart, the rub is it may

    fail to restart into the former OS X. You may choose to see if OS X Recovery

    could be used to repair or restore the former OS X; if you have good internet

    access and if your App Store has the system you had before macOS Sierra

    in the Purchases section of your App Store page. If not one it shipped with.


    OS X Recovery allows one of two ways (or in some instances more than one)

    to restore an original as-shipped former system, or to install the last one again.


    Because the newer series of Apple computer products do not ship with system

    install media for offline restoration, you have to be prepared & also back up stuff.


    Maybe someone else has a shortened version of exactly what to try; as you cannot

    just exit Sierra installer & reboot the computer. You have to use Keyboard Shortcut

    to change what is going to be the startup system; in OS X Recovery, you can use

    several utilities; and other choices. But if you get a rise out of the previous OS X

    by using Startup Manager, you may be able to repair that working system.


    Sorry to not have exact pathway to try & follow...

    Good luck!


  • by DanCornetto,

    DanCornetto DanCornetto Oct 7, 2016 12:41 AM in response to K Shaffer
    Level 1 (4 points)
    Oct 7, 2016 12:41 AM in response to K Shaffer

    I had the same problem yesterday, and i really don't know how i fixed it. After ten try instead of forcing me to install Sierra it let me install El Captain on an USB stick. Then i formatted the macintosh HD, restarted the system and, in safe mod, in disk utility restored all my back up data on the HDD.

    I had the same problem that you have, but now is running smoothly. I'll replace my original HDD with a new SSD, i don't want anymore trouble.