caesarkim
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Q: Upgraded to OS X El Capitan few days ago. Now my macbook pro keeps rebooting....

I upgraded my 15 inch macbook pro (2 years old) to OS X EI Capitan few days ago. It was working fine for 3 or 4 days, but all of sudden, when I came home from outside, I noticed that my macbook pro was rebooting all of sudden. When it reboots, I see a progress bar and it goes off and it starts booting again. It keeps repeating this process without even going to the login screen. I have to turn off the macbook to stop the continuous reboot. I have some backups in the time machine, so I restored the state to the latest installation (5 days old) of OS X El Capitan, but it still doesn't resolve the issue.

 

I didn't add any hardware since I purchased it. The only hard drive which is connected to my laptop is external USB hard drive which is used as time machine. And I use an external monitor to watch a movie. That's it.  And I didn't install any new software since the upgrade.

 

I ran Disk Utility in the Recovery Mode. And still no luck..

 

I am reading this resource OS X: When your computer spontaneously restarts or displays "Your computer restarted because of a problem." - Apple Supp…

 

It seems that I need to reinstall the OSX. Is there any other option?   If I reinstall the OSX again, do I need to reinstall all the apps again?  I am a software developer. I really do not want to go through all the installations again.   Started feeling disappointed at apple macbook pro as a new mac user.

 

I'd appreciated if there is any other option that needs to be recommended.

Posted on Jan 18, 2016 9:49 PM

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caesarkim

Q: Upgraded to OS X El Capitan few days ago. Now my macbook pro keeps rebooting....

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  • by Cunnla,

    Cunnla Cunnla Jan 18, 2016 10:09 PM in response to caesarkim
    Level 4 (2,016 points)
    Desktops
    Jan 18, 2016 10:09 PM in response to caesarkim

    See if you can find a kernel panic report when this happens. Mac OS X: How to log a kernel panic - Apple Support

    Constant restarting is often a sign of GPU problems but as your Mac is fairly new, it may not be so. Anyway, try to post a panic or crash report.

  • by caesarkim,

    caesarkim caesarkim Jan 18, 2016 10:36 PM in response to Cunnla
    Level 1 (0 points)
    Jan 18, 2016 10:36 PM in response to Cunnla

    Thanks for the reply. I took a pic with my phone. I'd appreciated if you have any idea about how to fix this issue.

     

    IMG_0165.JPG

  • by Cunnla,

    Cunnla Cunnla Jan 18, 2016 11:37 PM in response to caesarkim
    Level 4 (2,016 points)
    Desktops
    Jan 18, 2016 11:37 PM in response to caesarkim

    Hi,

    It seems to be CPU-related -- but then nearly everything in a Mac is . It is not easy to read from the image. Next time, do Command C on the part you want to post and paste it into your reply.

    In the meantime, read up on this Xlab document. http://www.thexlab.com/faqs/kernelpanics.html

    Also, try a Safe mode boot as recommended in this article. http://www.likelyanswer.com/28938410/Paniccpu-0-Caller-0xffffff7f99edb490

  • by caesarkim,

    caesarkim caesarkim Jan 19, 2016 8:00 AM in response to Cunnla
    Level 1 (0 points)
    Jan 19, 2016 8:00 AM in response to Cunnla

    I can't go to safe mode. It seems to be stuck as seen on the image.

     

    If I reinstall osx in the recovery mode, is it going to remove all the existing data and applications?

  • by Cunnla,

    Cunnla Cunnla Jan 19, 2016 2:39 PM in response to caesarkim
    Level 4 (2,016 points)
    Desktops
    Jan 19, 2016 2:39 PM in response to caesarkim

    What happens if you use the power switch to turn off the computer? If you restart while holding down the Shift key does it not enter Safe mode?

  • by Cmoore01,

    Cmoore01 Cmoore01 Jan 19, 2016 2:46 PM in response to caesarkim
    Level 2 (186 points)
    Mac OS X
    Jan 19, 2016 2:46 PM in response to caesarkim

    No, reinstalling the OS from the Recovery partition, does not overwrite the Apps or User folders. That is one thing I like about OS X, you can reinstall the Os or upgrade, without disturbing your installed Apps or Users data. The only apps that may be overwritten would be those apps internal to the OS, and have been upgraded, so they will be updated. Unless you have hard drive issues, you should be fine with restoring/reinstalling.  As always, it is best to have a backup of all your files and data, and it might be possible to boot from a bootable thumb drive and recover that way, but if nothing else, you have nothing to lose if you cannot boot from your boot drive.

     

    HAs Cunnla asked, what happens if you try to boot into safe mode?

  • by caesarkim,

    caesarkim caesarkim Jan 19, 2016 3:12 PM in response to Cmoore01
    Level 1 (0 points)
    Jan 19, 2016 3:12 PM in response to Cmoore01

    It does not go to the safe mode. It seems to be stuck in the picture that I uploaded. I waited more than 5 minutes, but it still did not go into the safe mode.

     

    I restored it to the working version of EI Capitan, but it still didn't work. So I restored it to the previous OS (yosemite). It is working fine now. I guess that I have to wait for several month to upgrade to EI Capitan, until it becomes more stable.  It is good to have time machine and source control for all of the files related to my project.

     

    Is there any better backup feature that anybody knows besides the time machine if this kind of issue happens?  Just curious.

     

    Thanks for all the answers.

  • by Cunnla,

    Cunnla Cunnla Jan 19, 2016 4:50 PM in response to caesarkim
    Level 4 (2,016 points)
    Desktops
    Jan 19, 2016 4:50 PM in response to caesarkim

    Regarding backups, you could try regular cloning to an external HD using third-party apps such as Superduper. This makes an exact copy of your startup disk, which you could keep as an alternative to Time Machine backups. However, it is not as versatile as Time Machine.