Q: Reboot fail after installing El Capitan help!!

Do not really understand your problems, but from reading, do not believe it is OS related. You wrote:

After reinstalling your Mac works, meaning El Capitan is working.

After an Office update it hangs, so there something did happen...

Maybe your HD is failing?

Try make a bootable thumb drive and check with disk utility. Did you make any backups? If not, make it now, before it is to late...

Anyway:

Please write down exactly what happens, and keep in mind: If you are looking for faulty Kexts and started Terminal from recovery, it will only find the libraries on your HD if you do a change directory to your internal HD (not the recovery partition) as in: cd /Volumes/MacHardDisk/ (substitute MacHardDisk with the name of your HD)

Surely somebody comes up with the fix!

BTW: You also wrote that Mavericks killed your DVD drive, IMHO impossible to happen, unless you did things with the DVD drive firmware (to make it region free?)

Ok, so far this is great,  everyone is happy solving their issues deleting Kexts   that's nice

Mine is the same, after putting my password, Gets stuck halfway on the loading bar..

But what if I cannot get into safe mode (holding shift key)

Or that repair mode (command r), I have been trying to get into it and after the loading bar is sometimes stuck halfway, sometimes it's done and just either brings me the grey screen or just now, it starts to beep sadly "beep, beep, beep" (3 times) continously..

I'm using my tablet to access the forums and typing on  it is a nightmare.. Plus I have work to submit!

Yaaay Very nice...!  Lol...

Seems not kext related... Check: About Mac computer startup tones - Apple Support

YOu know Apple has failed when I have to fire up an old Lenovo laptop to find out why my 4 year old Imac wont reboot.

no Gray or White Screen of death from Bill Gates

had to move that 2000 dollar paper weight into the corner to make room for finding asolution to my problem that doesnt appear to exist

I Mis spoke Mavericks didnt kill my superdrive upgrading to Yosemite did. And I am not alone

imac won't play DVDs in Yosemite

WHich is why I am suspicisous. Another new OS and now this is where I am at

1. Somehow i was able to reboot and copy my files to external drive. All my files were there

2. Thought it was back to normal after 4 days of routine use

3. This morning while I was on a phone call, screen suddenly went black. I wasnt using any productivity software just reading a web page

4. Started interminable reboots

5. Cannot boot in safe mode

6. Command Recovery does not work

i am typing this on an old Lenovo laptop. It easily outlasted the 4 years of my $2000 Imac

Since I am literally stumbling in the dark with no answer to El Capitan's endless reboots could it be a graphics card problem?

https://support.apple.com/en-us/HT203787

http://www.cultofmac.com/392991/el-crapitan-the-biggest-problems-plaguing-early- upgraders/

so Apple knew there were problems with El Capitan in beta. Esp. With one of my serious issues: Mac stopped booting in middle of Office iupgrade.

but Katy bar the door, they forced this on us any way.

congratulations Apple El Capitan is the first non-operating OS

I am really sorry to bother you again,  but I  have finally been able to get into recovery mode

Terminal is open.. I did type the same stuff you posted (system profiler SPExtensions...) Reading it from my tablet and typing it in terminal as is

I cannot copy and paste the code since I cannot open anything when terminal is open..

This is what I got :

/var/root/Desktop/KextsList.txt: no such file or directory

I am a designer,  I dont code..  Please bare with me

Ok, I just restarted the computer and it logged in..

But I am worried if I shut it down now...

Is there a way to get rid of the kexts without the terminal window?

Finally! it worked, I was able to remove the kexts using finder

Thanks GSfromNL

When I go to the terminal in my utilites and type that in it says "No file found" or something along those lines.

When I try to do this, it won't let me select "Macintosh HD".

CaseyG1217 wrote:

 

When I try to do this, it won't let me select "Macintosh HD".

.

CaseyG1217 wrote:

 

When I go to the terminal in my utilites and type that in it says "No file found" or something along those lines.

Writing an effective Apple Support Communities question

To Bob and Casey:

This should work, but terminal (read Unix) wants EXACT names, uppercase, lowercase, spaces and so on...

If there is a space in the name of your HD: it is crucial to type EXACT as I explained below:

So: Try the following commands in Terminal to list the kexts on your internal drive:

cd /Volumes/HDname

Replace HDname with the EXACT name of your harddisk.

If there is a space in the name of your HD: Type a slash after the first name, then a space, then the second name: Like HDname\ XX, otherwise terminal will NOT find your HD!

Then:

sudo ls -1 /Library/Extensions/ ; sudo find /System/Library/Extensions -ctime +1d -depth 2 ; sudo find /Library/Extensions -ctime +1d -depth 2

This will give you all the kexts to sort out, if you found them:

Move all suspects to a different location with these commands:

sudo md ~/System/Library/KextNotSupported

sudo md ~/Library/KextNotSupported

sudo cp ~/System/Library/Extensions/EXACT KEXT NAMES  /System/Library/KextNotSupported

sudo cp ~/Library/Extensions/EXACT KEXT NAMES /Library/KextNotSupported

Delete them in original location:

sudo rm ~/System/Library/Extensions/EXACT KEXT NAMES

sudo rm ~/Library/Extensions/EXACT KEXT NAMES

Note: replace EXACT KEXT NAMES with for instance EtimaAsync.kext

Hope this helps!

If so: Check the "box" this helped me.... Thanks!