Reboot fail after installing El Capitan help!!

You can also try holding down the option key at startup. Hold down before pressing the startup button and keep it down. Screen should come up with two hard drives. Select your hard drive and click start or continue. If the hard drives do not come up then try the above suggesting using the code.

Hope this helps.

Hello Tsofa, Your way of doing it will work, but... Not everyone has the same Kexts. For instance, the Etima kext comes from the app SyncMate, now obsolete. But not everyone has SyncMate ever installed. I did, with an old windows organizer, so Etima was in my Kexts as well. You apparently had something from Netgear and Blackberry (RIM), so these are the Kexts you have from those developers.

Everyone has his or hers Kexts, not necessarily Netgear or Blackberry, so you cannot use your, 'tailored' for your macs, script for everybody else's Mac.

The only way to sort them out is looking in /Library/Extensions AND /System/Library/Extensions and carefully move the suspects to a different folder (e.g. Unsupported) and delete them from their original location.

Glad it worked for you as well. Cheers!

BTW, I'am an old programmer dog from the MS-DOS days, from before and after, (Cobol, Assembler, PL1, who cares these days...) spended hours and days to solve my business Windows problems... With Mac, sporadical, but now kind of back in the old days. Should I be happy...?

The steps provided by Lucaspeed helped me.

However, since "com.apple.kext.caches" was a folder and not a file on my machine, I changed the command

rm com.apple.kext.caches

into

rm r com.apple.kext.caches

That's right!

I was writing from memory and I totally forgot that parameter.

I tried to edit my original post but seems impossible once someone replies.

The right command is:

# rm -r com.apple.kext.caches

I did the El Cap ugrade and no matter what I tried, it froze just between end of progress bar and login screen. Then rebooted, then could not find startup drive. Safe mode did the same thing. Resettin PRAM, NVRAM no good.

Fortunately, I always make a bootable usb stick installer and several bootable backups before doing these installs. No diagnostic would indicate what it was. So, I formatted my drive, did a test clean El Cap install on the same drive, which worked fine. This indicates that some drive problem, old files, drivers, loading programs, or something else on my Yosemite was not liked by El Capitan.

The fix was to do the clean install, then use migration tool to migrate everything from one of my fresh backups. This worked like a charm and left whatever the problem was behind.

Always have a fresh backup and always make a bootable OS usb stick installer before doing these JIC.

Hi, I have the same problem, cant boot after updating. And the kext theory sounds likely. But I havent a clue which files could be cuasing trouble. I copy my list here and if anyone would like to help finding potential candidates for removal please let me know!

ACS6x.kext

ATTOCelerityFC8.kext

ATTOExpressSASHBA2.kext

ATTOExpressSASRAID2.kext

ArcMSR.kext

CalDigitHDProDrv.kext

HighPointIOP.kext

HighPointRR.kext

PromiseSTEX.kext

SoftRAID.kext

hp_io_enabler_compound.kext

System/Library/Extensions/AppleMobileDevice.kext/Contents

System/Library/Extensions/AuthenticationSupport.plugin/Contents

System/Library/Extensions/AuthenticationSupportEnabler.plugin/Contents

System/Library/Extensions/BJUSBLoad.kext/Contents

System/Library/Extensions/EltimaAsync.kext/Contents

System/Library/Extensions/EPSONUSBPrintClass.kext/Contents

System/Library/Extensions/hp_designjet_series.kext/Contents

System/Library/Extensions/hp_Deskjet_io_enabler.kext/Contents

System/Library/Extensions/hp_fax_io.kext/Contents

System/Library/Extensions/hp_Inkjet1_io_enabler.kext/Contents

System/Library/Extensions/hp_Inkjet2_io_enabler.kext/Contents

System/Library/Extensions/hp_Inkjet3_io_enabler.kext/Contents

System/Library/Extensions/hp_Inkjet4_io_enabler.kext/Contents

System/Library/Extensions/hp_Inkjet5_io_enabler.kext/Contents

System/Library/Extensions/hp_Inkjet7_io_enabler.kext/Contents

System/Library/Extensions/hp_Inkjet8_io_enabler.kext/Contents

System/Library/Extensions/hp_Inkjet9_io_enabler.kext/Contents

System/Library/Extensions/hp_Inkjet_io_enabler.kext/Contents

System/Library/Extensions/hp_Laserjet_io_enabler.kext/Contents

System/Library/Extensions/hp_Officejet_io_enabler.kext/Contents

System/Library/Extensions/hp_Photosmart_io_enabler.kext/Contents

System/Library/Extensions/hp_PhotosmartPro_io_enabler.kext/Contents

System/Library/Extensions/hp_psa640_io_enabler.kext/Contents

System/Library/Extensions/hp_qc_io_enabler.kext/Contents

System/Library/Extensions/HuaweiDataCardDriver.kext/Contents

System/Library/Extensions/JMicronATA.kext/Contents

System/Library/Extensions/ssuddrv.kext/Contents

System/Library/Extensions/USBExpressCardCantWake_Huawei.kext/Contents

System/Library/Extensions/VideoGlide.kext/Contents

cheers, pierre

ps

I tried the cmd S but that gave nothing...

Hi Tsofa,

Look at my previous posting, but here again:

1) Open Terminal in /Applications/Utilities

2) Enter "system_profiler SPExtensionsDataType > ~/Desktop/kextList.txt" without the quotes and hit return (this will take a short while to run).

3) There should now be a kextList.txt file on your desktop, open it and press both the "Command" and "F" keys to bring up the find.

4) In the find field insert "Not Signed" Copy the destination to the .kext file to a list for use later. (Click next to cycle through all of them.) Example: /System/Library/Extensions/JMicronATA.kext

5) Browse your drive to /System/Library/Extensions and create a folder by the name Unsupported, move any of the unsigned kext files to the folder Unsupported. Delete the Kexts from their original location.

6) Browse in /Library/Extensions and create again a folder named Unsupported. Look if there are more unsupported Kext's and move them to the folder Unsupported. Delete the Kexts from their original location.

7) Beware that there may be Kext's that are "not signed" that you want to keep because you may need them for programs known and trusted by you, so do not move them to the unsupported folder(s). If you did, no worries, you can always put them back later if there are troubles.

8) Reboot and you should be all set.

Cheers!

Dear GS from NL.

I have the computer in the safe mode now and it is working, but not with all functions. I read your advice for Tsofa and I must confess that you already lost me in your first sentence:

1) Open Terminal in /Applications/Utilities

What terminal, where do I find /applications/utilities? I see that there is a lot of knowledge in this community, but much of it is 'going above my cap'

Fred

Hi guys, I am still struggling with this. I got some help pointing out what kext-files could be causing the problems, thank you GSfromNL. But I can't mange to delete them, I have tried several options but always get "No such file or directory". The name of my HD is Macintosh HD so it must be something else that I am missing?

-bash-3.2# cd /Volumes/Macintosh HD/System/Library/Extensions/

-bash: cd: /Volumes/Macintosh: No such file or directory

-bash-3.2# rm -r EltimaAsync.kext

rm: EltimaAsync.kext/Contents: No such file or directory

-bash-3.2# rm -r JMicronATA.kext

rm: JMicronATA.kext/Contents: No such file or directory

-bash-3.2# rm -r ssuddrv.kext

rm: ssuddrv.kext/Contents: No such file or directory

-bash-3.2# cd ../Caches

-bash: cd: ../Caches: No such file or directory

-bash-3.2# rm -r com.apple.kext.caches

rm: com.apple.kext.caches: No such file or directory

-bash-3.2# nvram -d boot-args

Does anyone has an idea why, please?

Cheers,

Pierre

Thanks' GSfromNL, very observant and helpful.

I did a re-install of the OS and then it started OK (like first time until you restarted). And then I went in manually and deleted the kext-files and ran a check in Terminal to see that they where really gone. But I haven't restarted yet...

same problem here. after i install el capital it just look good. but after i shut down and turn on a few times, it cannot reboot. stuck on the progress bar with no progress. i tried to reinstall the system a few times, but same problem happen. my laptop is macbook pro retina 2014

Hi,

Yes it seems as a few of us has/had this problem.

You can solve it in two ways I recon, either in SafeMode using the Terminal window or after a re-install when it's working (before restart) manually remove the files that causes the problems. And the files causing the problem are kext-files. This is individual depending on what 3rd party software installed on your computer. For me it was these files: EltimaAsync.kext, JMicronATA.kext, ssuddrv.kext and VideoGlide.kext (I don't really know if it was all of them or just some but it worked after deleting them).

Either way you chose it's a good thing to use Terminal to get the list of kext-files to identify and then also check that they are gone after you have tracked them down and deleted (or just moved them). This is the script to use in Terminal for list of kext-files:

cd "/Volumes/Macintosh HD" ; ls -1 Library/Extensions/ ; find Library/Application\ Support -iname *.kext ; find Library/Filesystems -iname *.kext ; find System/Library/Extensions -ctime +2d -depth 2

Cheers and good luck,

Pierre

Hi, so let's make the point of this issue, I seems to be just for few users a small perceptual, apple haven't resale update or any important announcement... So at moment we all standing alone here trying to helping each other... After reading all those interesting post we can come up that the problem come from third part software ... I want to give my contribute.

After Installing El Capitan I never had any problem with restart (I mean I had one ore two restart only) before installing this software

MAMP PRO

So If anyone who is occurring with this problem has installed this software please let know.

I try to uninstall and restart but problem still there (mybe the uninstaller don't remove all script)

Thank you

Mark

This worked for me. Awesome! Thanks!

But there a caveat, for the system profile command to give accurate results, it must be booted from the bad EC disk. The one that works before reboot. I did a clean install and then a migration thinking I would accomplish the same. It did not. However, since it gave me a working copy with all the date, I created the list file per your instructions. After the reboot failed, I rebooted in recovery mode, ran the rest of the process (painful since I had to do it from command line, no command find), rebooted and voila! Everything works. Well, I did loose a few things like AirParrot but those I can fix later.

Thanks again.