Reboot fail after installing El Capitan help!!

I have the same problem and have restored twice with the same problem. I did run across this solution, but am to tired to try it right now. I do not plan to shutdown again until I can get it fixed on my other mac computer. Having the same problem on both. Keep you posted.

https://forums.developer.apple.com/thread/21331

Either way, this is best fixed from Recovery Mode, but you shouldn't have to reinstall again to boot normally because moving the kexts in Recovery Mode should allow the boot process to continue as normal. Let me know how it goes.

1. So Boot into Recover Mode.
2. From the central menu open Disk Utility.
3. Then select the "Macintosh HD" partition, then the "Unlock" from the "File" menu (Skip this step if you can't see "unlock")
4. Select the Get Help Online link from the meunbar to open Safari.
5. Navigate back to this thread.
6. Select all of the writing in bold below and press cmd+C to copy it to the clipboard:

   cd "/Volumes/Macintosh HD/Library/Extensions/" ; mkdir Unsupported ; mv hp* Unsupported ; mv B* Unsupported ; cd "/Volumes/Macintosh HD/System/Library/Extensions/" ; mkdir Unsupported ; mv Elt* Unsupported ; mv ssud* Unsupported ; rm -Rf /Volumes/Macintosh\ HD/Library/Application\ Support/Rox* ; rm -Rf /Volumes/Macintosh\ HD/Library/Application\ Support/Check* ; rm -Rf /Volumes/Macintosh\ HD/Library/Filesystems/*fuse* ; rm -Rf /Volumes/Macintosh\ HD/var/folders/*

7. Then go to the Utilities menu, open Terminal and press cmd+V to paste the long command into it.
8. Restart normally a couple of times to confirm