nahl technonatura

Q: Mac os sierra installation failed, how do I get back to os x yosemite

today i install mac os sierra on macbook pro 2012, however I have a problem when it says Mac OS could not be installed on your computer, close the installation to restart your computer and try again, I tried to shut down the installation and then I was directed to Startup disk, but still can not get out, I tried to restart my macbook, macbook when lit reinjected into penginsatallan sierra and remained unsuccessful.

I hope you can help me to return to my old os (yosemite)

I was a little panicked right now

I am sorry, my English is not good

MacBook Pro

Posted on Sep 21, 2016 12:32 AM

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Q: Mac os sierra installation failed, how do I get back to os x yosemite

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  • Helpful answers

  • by LACAllen,

    LACAllen LACAllen Sep 21, 2016 1:55 AM in response to nahl technonatura
    Level 5 (4,899 points)
    iCloud
    Sep 21, 2016 1:55 AM in response to nahl technonatura

    Use the backup you created before you updated.

     

    Or How to reinstall OS X - Apple Support

  • by nahl technonatura,

    nahl technonatura nahl technonatura Sep 21, 2016 1:58 AM in response to LACAllen
    Level 1 (6 points)
    Mac OS X
    Sep 21, 2016 1:58 AM in response to LACAllen

    My mistake was not backed up before I do an update.    is there any other way?

  • by Wolf Wrobel,Helpful

    Wolf Wrobel Wolf Wrobel Sep 21, 2016 2:38 AM in response to nahl technonatura
    Level 1 (67 points)
    Mac OS X
    Sep 21, 2016 2:38 AM in response to nahl technonatura
  • by mike 2.0,

    mike 2.0 mike 2.0 Sep 21, 2016 6:55 PM in response to nahl technonatura
    Level 1 (20 points)
    Mac OS X
    Sep 21, 2016 6:55 PM in response to nahl technonatura

    I'm having a similar issue. I have a Macbook Pro Retina 2012 and Sierra wouldn't install I got the error message:

     

    "macOS could not be installed on your computer. An internal error has occurred. Quit the installer to restart your computer and try again [Restart Button]"

     

    When I quit the installer, it successfully restarted and allowed me to get back to my old OS (El Capitan), so sorry I can't be of more help.

     

    My issue is, no matter what I try, I can't seem to install the new macOS Sierra. I've even wiped my entire computer and started from scratch, installing a clean OS X 11 (El Capitan) and then trying to install Sierra, but still it doesn't work. This is making me think maybe it's an issue with my App Store account? But since I was logged in, I'm not sure what that could be. I dunno. Maybe it's actually hardware related? But I've run Disk Utility, and it says everything is fine.

     

    Super frustrated, definitely would love some guidance, thanks!

  • by darkdalo,

    darkdalo darkdalo Sep 22, 2016 8:43 AM in response to nahl technonatura
    Level 1 (4 points)
    Sep 22, 2016 8:43 AM in response to nahl technonatura

    Same issue here.  Mine is a MacBook Pro (not retina) 2012.  I upgraded the hard drive like a year ago (before el capitan) to an SDD 500GB drive and encrypted the file system. 

     

    Everything was running smooth,  so i decided to upgrade to sierra last night.  The installer downloaded ok from the appstore, i started the installation,  but after it rebooted, the installer app stalls and shows a message stating that "macOS could not be installed on your computer" - File system verify or repair failed. - Quit the installer to restart your computer and try again.

     

    Here's the error:

    WhatsApp Image 2016-09-22 at 10.28.16 AM.jpeg

     

    Obviously i opened the "Disk Utility" app to check the file system on my disk,  getting also an error,  stating that the file system could not be repaired after 3 attempts. This is really weird because as i said,  the system was running just fine,  before i tried to upgrade.

     

    The real problem here is that the computer entered in a loop that i can not get out.  When i click in the restar button,  the computer restarts but always tries to resume the installation,  stalling at the same point,  over and over again.

     

    So,  the question is:  can i avoid the installer to restart every time i reboot the computer?  or there's already a permanent damage to the elcapitan osx and it will not boot again?.  In the worst case scenario,  i'll be forced to try to move my data to an external drive using the terminal interface available through the installer app,  because the files are encrypted and i can not recover them directly without entering the password for decryption.

     

    Thanks in advance for any tip.

  • by Gaboose1,

    Gaboose1 Gaboose1 Sep 22, 2016 4:51 PM in response to darkdalo
    Level 1 (4 points)
    iPad
    Sep 22, 2016 4:51 PM in response to darkdalo

    I had this same issue, and still can't figure out how to get Sierra installer past the error (An internal error has occurred. Quit the installer to restart your computer and try again), but each time I give it a try I find I need to restart into recovery mode (power down, power back up with Command-R held) and restore from Time Machine backup.  Hours of churning each time I try.  Very frustrating...  Anyone have answers on this?