Hi Max, I seem to have the same issue as others with the el Capitan installation. I've followed your advices. Here the result, can you help?
-bash-3.2# cd "/Volumes/Macintosh HD" ; ls -1 Library/Extensions/ ; find Library/Application\ Support -iname *.kext ; find Library/Filesystems -iname *.kext ; find System/Library/Extensions -ctime +2d -depth 2
ACS6x.kext
ATTOCelerityFC8.kext
ATTOExpressSASHBA2.kext
ATTOExpressSASRAID2.kext
ArcMSR.kext
BJUSBLoad.kext
CIJUSBLoad.kext
CalDigitHDProDrv.kext
HighPointIOP.kext
HighPointRR.kext
PromiseSTEX.kext
SoftRAID.kext
Unsupported
hp_io_enabler_compound.kext
Library/Application Support/Kaspersky Lab/KAV/Data/Updater/Temporary Files/rollback/patch/AutoPatches/kavmac/8.0.2.460/klif.kext
Library/Application Support/Kaspersky Lab/KAV/Data/Updater/Temporary Files/temporaryFolder/AutoPatches/kavmac/8.0.2.460/klif.kext
Library/Filesystems/osxfusefs.fs/Support/osxfusefs.kext
System/Library/Extensions/AppleMobileDevice.kext/Contents
System/Library/Extensions/hp_fax_io.kext/Contents
System/Library/Extensions/hp_Photosmart_io_enabler.kext/Contents
System/Library/Extensions/HuaweiDataCardACMControl.kext/Contents
System/Library/Extensions/HuaweiDataCardACMData.kext/Contents
System/Library/Extensions/HuaweiDataCardActivateDriver.kext/Contents
System/Library/Extensions/HuaweiDataCardDMM.kext/Contents
System/Library/Extensions/HuaweiDataCardDriver.kext/Contents
System/Library/Extensions/HuaweiDataCardECMControl.kext/Contents
System/Library/Extensions/HuaweiDataCardECMData.kext/Contents
System/Library/Extensions/HuaweiDataCardHidPort.kext/Contents
System/Library/Extensions/HuaweiDataCardJUBusDriver.kext/Contents
System/Library/Extensions/HuaweiDataCardJUCDCACMDriver.kext/Contents
System/Library/Extensions/HuaweiDataCardJUCDCECMDriver.kext/Contents
System/Library/Extensions/JMicronATA.kext/Contents
System/Library/Extensions/Lexmark X422.kext/Contents
System/Library/Extensions/LogitechUSBHIDevices.kext/Contents
System/Library/Extensions/SiLabsUSBDriver.kext/Contents
System/Library/Extensions/SiLabsUSBDriver64.kext/Contents
System/Library/Extensions/TabletDriverCFPlugin.bundle/Contents
System/Library/Extensions/USBMoneyPenLoad.kext/Contents
System/Library/Extensions/VaraAudio.kext/Contents
System/Library/Extensions/Wacom Tablet.kext/Contents
System/Library/Extensions/WTG-NMSonyEricssonMD300.kext/Contents
System/Library/Extensions/WTG-SierraHSRKicker.kext/Contents
System/Library/Extensions/WTG-SierraHSRSupport.kext/Contents
System/Library/Extensions/WTG-SierraSupport.kext/Contents
System/Library/Extensions/WTG-SierraSupportKicker.kext/Contents
System/Library/Extensions/WTG-SierraSwitch.kext/Contents
-bash-3.2#
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-Max