xevtbng
Level 1 (0 points)

Q: Stuck at booting loop after trying to install El Capitan

Hi,

 

So I downloaded El Capitan, installed until it got stuck at 23%, laptop then automatically rebooted and gets stuck with the following error (image). First it says restarted because of an error, then all of this. My laptop automatically repeats this a couple of times, then shuts itself down.

 

http://imgur.com/kNFCJjv

 

What to do?

MacBook Pro, OS X Yosemite (10.10.5)

Posted on Oct 1, 2015 8:49 AM

by alex_h1,Solvedanswer
alex_h1 alex_h1
Community Specialists
A:

Hello xevtbng,

Thanks for using Apple Support Communities.

 

From the description of the text on the Apple logo screen, combined with your photo, it looks like your Mac is experiencing a kernel panic.  As a first step I suggest booting into the recovery partition, and then verify that your disk is okay.  If your disk needs to be repaired, please do as such.  If the verification goes well, then the next step is to reinstall the OS.  This can be done in recovery by selecting the Reinstall OS X option.

 

Try Disk Utility

Use these steps to use the Disk Utility app to verify or repair a disk.

  1. If you're using OS X Lion or later, start the computer from Recovery System or Internet Recovery. If you're using an older version of OS X and your computer came with a Mac OS X Install disc, insert the installation disc and restart the computer while holding the C key instead.
  2. When your computer finishes starting up, choose Disk Utility from the Utilities window, or from the Installer menu if you're started from an installation disc.
  3. Click the First Aid tab.
  4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
  5. Select your Startup Disk (usually named "Macintosh HD").
  6. Click Repair. Disk Utility checks and repairs the disk.

Resolve startup issues and perform disk maintenance with Disk Utility and fsck - Apple Support

 

Reinstall OS X from Recovery

If have a recent Mac, you can use OS X Recovery to reinstall OS X.

  1. Turn on your Mac.
  2. Immediately after you hear the startup sound, hold the Command and R keys on your keyboard. 
  3. Release the keys after the Apple logo appears.
  4. If prompted, select a Wi-Fi network, or connect your Mac to the Internet using an Ethernet cable.
  5. After the Recovery menu appears, select the option to Install OS X.
  6. Follow the onscreen prompts to select your destination disk and install OS X. 

How to reinstall OS X on your Mac - Apple Support

 

Cheers.

Posted on Oct 1, 2015 1:10 PM

Close
xevtbng

Q: Stuck at booting loop after trying to install El Capitan

  • All replies
  • Helpful answers

  • by alex_h1,Solvedanswer

    alex_h1 alex_h1 Oct 1, 2015 1:10 PM in response to xevtbng
    Community Specialists
    Oct 1, 2015 1:10 PM in response to xevtbng

    Hello xevtbng,

    Thanks for using Apple Support Communities.

     

    From the description of the text on the Apple logo screen, combined with your photo, it looks like your Mac is experiencing a kernel panic.  As a first step I suggest booting into the recovery partition, and then verify that your disk is okay.  If your disk needs to be repaired, please do as such.  If the verification goes well, then the next step is to reinstall the OS.  This can be done in recovery by selecting the Reinstall OS X option.

     

    Try Disk Utility

    Use these steps to use the Disk Utility app to verify or repair a disk.

    1. If you're using OS X Lion or later, start the computer from Recovery System or Internet Recovery. If you're using an older version of OS X and your computer came with a Mac OS X Install disc, insert the installation disc and restart the computer while holding the C key instead.
    2. When your computer finishes starting up, choose Disk Utility from the Utilities window, or from the Installer menu if you're started from an installation disc.
    3. Click the First Aid tab.
    4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
    5. Select your Startup Disk (usually named "Macintosh HD").
    6. Click Repair. Disk Utility checks and repairs the disk.

    Resolve startup issues and perform disk maintenance with Disk Utility and fsck - Apple Support

     

    Reinstall OS X from Recovery

    If have a recent Mac, you can use OS X Recovery to reinstall OS X.

    1. Turn on your Mac.
    2. Immediately after you hear the startup sound, hold the Command and R keys on your keyboard. 
    3. Release the keys after the Apple logo appears.
    4. If prompted, select a Wi-Fi network, or connect your Mac to the Internet using an Ethernet cable.
    5. After the Recovery menu appears, select the option to Install OS X.
    6. Follow the onscreen prompts to select your destination disk and install OS X. 

    How to reinstall OS X on your Mac - Apple Support

     

    Cheers.

  • by xevtbng,

    xevtbng xevtbng Oct 2, 2015 4:09 AM in response to alex_h1
    Level 1 (0 points)
    Oct 2, 2015 4:09 AM in response to alex_h1

    Worked like a charm. Even my data is still there, thanks!

  • by sim_ulant,

    sim_ulant sim_ulant Oct 3, 2015 6:57 AM in response to xevtbng
    Level 1 (0 points)
    Oct 3, 2015 6:57 AM in response to xevtbng

    Interestingly the first boot went fine for me, and then got stuck at the loading screen every other time. A 20 hour downgrade has got it all back, but it's not a happy thin to have to do.

    All the suggested fixes failed, as did PRAM zapping, SMC blessing, Simple mode boots, etc. Glad it worked for you though.