El Capitan update won't boot

Please can somebody help?

I see a lot of unsigned extensions in System Report!! But how can i remove this? I see no possibility in system report 😕

thank you in advance

Brainlight wrote:

Please can somebody help?

You need to create your own Discussion: Writing an effective Apple Support Communities question

i see a lot of unsigned extensions!! But how can i remove this? I see no possibility in system report

again thank you in advance

@Brainlight - I also see a lot of unsigned extension but none of them appear in /System/Library/Extensions - that seems to be ok and I've had no problem since I removed EltimaAsync.kext

@Brian273

yes i see the EltimaAsync.kext in System Report under unsigned extensions but not in System/Library/Extensions???

What can i do😕

Hi,

I do NOT have the EltimaAsync extension in the system report. I know that also org.virtualbox... might cause the same problem. But I do not have that as well in the report.

There are a number of unsigned kext in the report: Two from HP (for my OfficeJet 7500 AiO Printer), a number of files from Huawei for my UMTS/LTE USB stick, one from Logitech for my ForceFeedback Wheel and one I can't assign to anything known (MBBFCDataCardACMData - might be related to my USB card reader for HBCI Online Banking).

So question is: Might it help to uninstall (simply delete ?) the kext files and retry ? I'm a little bit afraid of trying to, because I don't want to overseers my luck in restoring from time machine - I did that three times now.

I would like to upgrade to El Capitan but don't want to go through all the re-installing everything from scratch.

Cheers

Christian

Ok , after too many attempts here my solution :

First of all my macosx El Captain was freeze at the loading pane stage while it is at %100 ,

Safe mode didn't work for me , i couldn't manage to go in safe mode,

1- So i went to recovery mode by cmd+R at the startup,

2- Than i unlock my Macintosh HD in disk utility at the file menu ,

3- I start terminal window at the Utilities bar ,

4- I go to Volumes / Macintosh HD / System / Library / Extensions directory , and i didn't have the file EltimaAsync.kext , remember that this is the not only file that cause that problem, than i tried to figure out other 3rd party drivers, in my case i have Huawei 3g modem drivers in that directory , i deleted these files as in the rm -rf unix command, this worked for me, so you should search other 3rd party drivers in that directory and move them to unsupported directory or delete them.

This will fix your problem.

Anyway it ***,

@1ntrud3r

This sounds good for a solution!! But how is the way togo in Terminal to Volumes / Macintosh HD / System / Library / Extensions directory ?

After you login to recovery mode , first unlock your HD with disk utility , than it mounts your HD to go there , don't mix the directories in recovery HD , so after you run the terminal in utilities menu , than run in terminal :

cd /Volumes/Macintosh\ HD/System/Library/Extensions

do ls after that , it will show the files in Extensions directory ,

You can search over there

Hey guys,

after three failed tries to install El Capitan, I managed to do so today !

For me it were some Kernel Extensions. Which one exactly, I don't know, but it must be one of:

• Huawei UMTS USB Stick
• Logitech Force Feedback for Gaming Wheel
• Some old HP printer driver stuff

At least, that was what I deleted from /System/Library/Extensions or /Library/Extensions.

After deleting (with making backup of those and rebooting for testing) I ran another installation of El Capitan, left my desk and when I returned, I was prompted for login and everything works !

Good luck out there !

Cheers

Christian

I had the same issue after updating to 10.11.1

I solved it by moving all extensions to a temp folder after that i rebooted and all is fine. Then i looked at everyone of them and decided who stays and who goes.

Here is a step by step.

1. use cmd + s to boot into single user mode

2. check and mount disk (follow the instructions n screen how to do this)

3. create a temporary directory for all the extensions: mkdir /tmpext

4. move all extensions from the extensions catalog to the newly created tmp catalog: mv /Library/Extensions/* /tmpext/

5. restart your mac : reboot

then look and try to figure out what you need from the tempest catalog. For me it was mostly old junk.

Hope this helps.

/martin

I had this same issue after installing El Capitan. Everything seemed fine until I tried to restart. I finally got it shut down and when I tried to start again it wouldn't boot.

Max108 over on the Developer Forums fixed the problem for me and my MacBook Pro is starting up just fine now. I found him here: https://forums.developer.apple.com/message/68726

Turns out, AVG free anti virus was the culprit in my case....

Hello, I just wanna tell you how I managed today to install El Capitan.

I have had the same trouble a month ago after restarting the new system the second time. At this time I decided to go back to Yosemite from my backup.

But yesterday I’ve found this:

http://blog.eltima.com/2015/10/critical-issues-with-syncmate-4-on-el-capitan-os- x-10-11.html

Yes, unfortunately I have had that bad EltimaAsync.kext in my system report.

But now it was easy to remove it without terminal.

I installed El Capitan again today and everything is working very well so far.

Well, well, well. How history always seems to repeat itself.

Remember those times fiddling with system extensions back in the Mac OS 9 and earlier days? Some were fighting each other causing system freezes, crashes and odd behaviour in the middle of a session or at boot time. So you had to put them aside one by one to see which one was causing the problem. Well here we are again. No nice GUI with puzzle shaped icons this time, just raw command line language.

My old MacBook 2010 upgraded like a breeze from 10.9 to 10.11, however after 10.11.1 it got stuck at boot time. Verbose mode didn't give a hint what might be the problem. Reading in this post about the Eltima kext, which I didn't have btw, I moved all kext's older than mid 2014 aside in a Terminal session in recovery mode.

These were the bad guys for me:

System/Library/Extensions/USBExpressCardCantWake_Huawei.kext

System/Library/Extensions/Vodafone.kext

In Terminal type:

cd /Volumes/<your harddrive>/System/Library/Extensions

mkdir temp

mv <extension name> temp/

Automatic backup, system self repair, integrity protection, and other systems alike, to what avail if incompatibilities are not detected? Please Apple don't put us through that system extension **** again. Make OS X rock solid again.

This looks like my problem, but my Harddrive is just called Macintosh HD & Terminal does not see it! Any other way to get rid of this crap?

Hi peachtree55

I just found my HD in the /Volumes folder. Although I did not have to that, I also read somewhere you may first need to mount your drive with "Disk Utility".

HTH