El Capitan won't Boot after update

never mind.

Having had the problem resolved it reappeared randomly. Whenever I would want to restart my MacBook Pro Early 2011 would hang. I would then have to redo some or all of the aforementioned solutions (deleting .kext file, touching folder, run diagnositics ...). Too much bother though. I restored my Yosemite Backup now and will wait till Apple will sort this out properly. I really hope they will, because I liked what I saw in El Capitan.

I just completed the upgrade from Mavericks. All i can say, is that thank god i have time machine on an external drive..It took a few tries, but I am finally doing the restore process from earlier today back to mavericks..

IM waiting the recommended three months before retrying this software. I don't want to go through all that again.

Cannot believe we are given an update that causes out computers to fail to boot up.

i called help support, a complete waste of time. Honest a complete waste of space.. might as while talked to my fish!

the only option i have is not to reboot my computer or shut down, as i do not want to keep installing the OS again and again and again and again....

Complete Rubbish!!!

Luckily i had time machine. I restored my bu from early this morning. I called apple support and they wanted me to pay..

Everything was fine until I restarted, now all I get is a white apple against a black background and no matter what I do I can't get past this. Such a SHAME! Why do they release faulty updates?????????

My MBA wouldn't restart with El Capitan, progress bar not moving at all.

Given a recent Time Machine back up...

I restarted holding Command R, selected Disk Utility and erased my internal drive.

Then used Restore OSX which retrieved the latest version through my internet connection.

As it restarted itself and went through the normal options I selected "use data from a Time Machine backup".

This installed my user data and app files onto the fresh system.

Took a while but now works normally again.

I guess enhanced system security was tripped up by a legacy file from an old app.

Hope this suggested option helps.

Based on all the suggestions here are any permanent solutions?

I Can appreciate all the work arounds people have provided ... But what if an average or grandma user try's to update to EC. ?

Does Apple just assume that everyone can follow these directions?

Apple needs to make some adjustments! I'll wait for two or three months before trying this again!

I resolved this like ChrisThomerson. I did a "clean" install with bootable USB and erased HD, rather than upgrade on top of Snow Leopard. This worked by manually migrating specific data folders rather than migrate everything. Actually it is running much faster than the original install on top of SL. Apple has some issues to work out for sure.

HI iMoto

THis version should never had been released, not everyone has the know how to over come the problem

mine is still under warrant however the support Staff are the worst of space and time.

im sure they read from a list and have very little understand on how best to support us the customer...

Im sure if you install the OS in a USB stick you required the stick to be 9GB and best format in Recover Mode !

Do you run OS X Server 4.x on the system with problems? If so, first update and install

Server 5.0.4 and install El Capitan afterwards.

I was able to revert back to Yosemite. Like an idiot, I upgraded to El Capitan without a current Time Machine backup.

Everyone's instructions didn't work until I did what Carlos suggested on 10/06, except, his method didn't work for me.

What I did was, i followed his instructions, pulled up the terminal, typed the code in there & because it didn't work, I exited the terminal.

Then from there I just happened to click on the Apple logo on the upper left corner & there it said start up disk. I clicked on that & my Mac rebooted with old OS as if nothing had happened.

I'm going to purchase a new external drive & do a Time Machine backup before attempting this again.

absolutly correct.

It is very disappointing and I did not expect that from apple!

Where is a defintiv solution? As mentioned by many other users I d'ont want to retry this update many times.