Hello there.
I had installed the new El Capitan on my mac, and I couldn't boot. I read on the forum that Max had a solution but I couldn't made it display the output from ls command (In recovery mode I can only open either Safari or Terminal app, don't know why). I decided to reinstall the OS, and after the re-install was finished, it took 10 minutes to boot, but evetually it did.
I am afraid to restart now... This is the output from this commnad:
sudo ls -1 /Library/Extensions/ ; sudo ls -1 /Library/Application\ Support/VirtualBox/ ; sudo ls -1 /Library/Application\ Support/EltimaSyncMate/ ; sudo find /System/Library/Extensions -ctime +1d -depth 2
Output:
ACS6x.kext
ATTOCelerityFC8.kext
ATTOExpressSASHBA2.kext
ATTOExpressSASRAID2.kext
ArcMSR.kext
CalDigitHDProDrv.kext
HighPointIOP.kext
HighPointRR.kext
PromiseSTEX.kext
SoftRAID.kext
ls: /Library/Application Support/VirtualBox/: No such file or directory
ls: /Library/Application Support/EltimaSyncMate/: No such file or directory
/System/Library/Extensions/AppleHWAccess.kext/Contents
/System/Library/Extensions/AppleMCEDriver.kext/Contents
/System/Library/Extensions/AppleXsanFilter.kext/Contents
/System/Library/Extensions/IOAudio2Family.kext/Contents
/System/Library/Extensions/JMicronATA.kext/Contents
/System/Library/Extensions/RemoteVirtualInterface.kext/Contents
If there is something extra that needs to be removed, let me know. I am not restarting anytime soon..