HT201475: Upgrade to OS X El Capitan
Learn about Upgrade to OS X El Capitan
Q: Reboot fail after installing El Capitan help!!
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Oct 4, 2015 2:42 AMby GSfromNL,For everyone: faulty KEXTS...
I found yesterday evening the same in the developers forum mentioned by Tsofa.
Did not have the time to post or the time to check my Kext's. Will do today and make a bootable USB as well.
But:
Do not use the line mentioned in post following point 6 from Tsofa!
This solution was tailored for a specific user by a Mac-Guru called Max108 (Thanks!) and therefore not suitable for every user.
First look at the Kext's that Terminal will display, copy and paste it in a text editor.
Then look very careful what Kext's you do'nt use or are suspected.
Also: in the line after 6 it says:
cd "/Volumes/Macintosh HD/Library/Extensions/" (and so on...)
Do not put in both quotes and replace the name Macintosh HD with the name of your harddisk or SSD.
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Oct 4, 2015 3:03 AMby Lucaspeed,Start your Mac keeping CMD+S pressed until you see white text on a black background then release them.
At some point (very soon after boot) your Mac will hang telling you (I'm sorry, you'll have to read it yourself) that something crashed, showing you a backtrace of the problem.
You'll see something like com.somevendor.somesoftware is in the backtrace.
That identifier can help to find what software is causing the problem.
Once you have the kext name you can boot in Recovery, start Terminal and do a
# cd /Volumes/YourHDName/System/Library/Extensions/
# rm -r FaultyKext.kext
# cd ../Caches
# rm com.apple.kext.caches
# nvram -d boot-args
The last step is to clear the nvram.
This steps are to remove a faulty kext only, please don't use them if your problem is not kext related.
I'm sorry I cannot help more than this, mainly because (1) English is not my native language and (2) I can't replicate the issue right now
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Oct 4, 2015 3:03 AMby DoNotStaple,I had the same problem. El Capitan installed OK, but when I did a reboot, I just got the white screen with the Apple logo, and a progress bar that progressed about 2/3 of the way. After an hour of nothing happening, I shut down my iMac completely. Here is what I did and it worked:
1. Shut your Mac down completely with the power button .
2. Press and hold down the Option key - don't let it go, just keep holding it down.
3. Press your power on button to start up your Mac.
4. In a short while you will see two hard drives. The one on the left is silver in color, and the one on the right is Orange/Yellow which is your recovery drive.
5. Click your mouse only on the silver hard drive icon.
6. It should immediately boot your Mac into El Capitan.
7. If you just turn on with the power button, without holding down the Option key, it will just sit there and nothing will happen as I said in my first paragraph.
I hope it works for you, and I hope Apple fixes this problem soon so it will boot up normally.
Good Luck
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Oct 4, 2015 3:22 AMby ED.Wildsau,Similar story here,
updated then it restarted the system and my login screen came up (apple encrypted HDD). So far all smooth but after I enter the password the system crashes and starts again. I reset PRAM / SMC no change, and I couldnt even boot in the safe mode. Hardware test result was fine no issues at all. Lucky I could recover from a time machine backup though I still lost my parallels system now forever.... Thanks Apple great Job on this update.... Steve would have fired the whole lot of you on the spot.
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Oct 4, 2015 6:24 AMby Tsofa,HelpfulHey I ran across this fix and it worked for me on two machines.
Email this code to yourself, but change the machine name to YOUR EXACT machine name.
- cd "/Volumes/MacMini HD/Library/Extensions/" ; mkdir Unsupported ; mv Net* Unsupported ; mv Sym* Unsupported ; mv hp* Unsupported ; mv ndc* Unsupported ; cd "/Volumes/MacMini HD/System/Library/Extensions/" ; mkdir Unsupported ; mv Belc* Unsupported ; mv Eltima* Unsupported ; mv hp* Unsupported ; mv Hua* Unsupported ; mv Netg* Unsupported ; mv Remo* Unsupported ; mv RIM* Unsupported ; mv USBEx* Unsupported ; rm -Rf /Volumes/MacMini\ HD/Library/Filesystems/*fuse* ; rm -Rf /Volumes/MacMini\ HD/Library/Application\ Support/Sym* ; rm -Rf /Volumes/MacMini\ HD/var/folders/*
Boot in Restore mode.
Click OS help and Safari will open
Open your email and copy the code
Quit Safari and open Terminal from the top menu
Paste the code and hit return.
Give it a minute or two. When it is done you will then be able to quit Terminal.
Restart
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Oct 4, 2015 7:16 AMby GSfromNL,HelpfulHi everyone!
Think I've got the final solution, found a nifty trick at OWC's website.
The previous poster is almost right, but it is a tailored solution that will not work for everyone, because everyone has different Kext's by different developers and vendors.
It seems to be all about Kexts and they are in TWO locations, /Library/Extensions AND /System/Library/Extensions.
If you cannot boot, as was the case with me, start a recovery, either via internet or a thumb drive.
It will not destroy everything so no clean install necessary.
After startup do the following (I did everything with Finder):
From OWC and edited by me:
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.
This did the trick for me, hopefully for everyone...?
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Oct 4, 2015 8:02 AMby pedro ramon,Hi GSfromNL,
I reinstalled El Capital 3 times, reset pram, reboot and use the disk utilities to repair disk (o permission repair anymore in El Capitan), try safe boot (not working) and finally your solution, because the first reboot fail after installing.
But when I go to step 4 "Not Signed" nothing happened, no list. So it seems not to be the solution ?
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Oct 4, 2015 8:46 AMby Tsofa,This works Pedro.
Hey I ran across this fix and it worked for me on two machines.
Email this code to yourself, but change the machine name to YOUR EXACT machine name. The MacMini HD is the name of one of my macs. Make sure that you replace it with you exact hard drive name. Do not us HD if your hard drive does not have that in its name. Replace it everywhere in the text.
- cd "/Volumes/MacMini HD/Library/Extensions/" ; mkdir Unsupported ; mv Net* Unsupported ; mv Sym* Unsupported ; mv hp* Unsupported ; mv ndc* Unsupported ; cd "/Volumes/MacMini HD/System/Library/Extensions/" ; mkdir Unsupported ; mv Belc* Unsupported ; mv Eltima* Unsupported ; mv hp* Unsupported ; mv Hua* Unsupported ; mv Netg* Unsupported ; mv Remo* Unsupported ; mv RIM* Unsupported ; mv USBEx* Unsupported ; rm -Rf /Volumes/MacMini\ HD/Library/Filesystems/*fuse* ; rm -Rf /Volumes/MacMini\ HD/Library/Application\ Support/Sym* ; rm -Rf /Volumes/MacMini\ HD/var/folders/*
Boot in Restore mode.
Click OS help and Safari will open
Open your email in iCloud or where ever you access your email on the internet and copy the code
Quit Safari and open Terminal from the top drop down menus
Paste the code (command v) and hit return.
Give it a minute or two. When it is done you will then be able to quit Terminal.
Restart
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Oct 4, 2015 8:48 AMby Tsofa,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.
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Oct 4, 2015 9:13 AMby GSfromNL,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.
