Resolved Migrated kernel extensions in /Library/Extensions

[KALLT]

I noticed that there are several kernel extensions in /Library/Extensions that are neither made by Apple nor were they installed by me. I happen to have access to a Snow Leopard partition and I can see that most of these extensions are present in /System/Library/Extensions (except the first two below), but not in El Capitan anymore. I presume that these extensions were moved to /Library/Extensions upon installing El Capitan, given that the System folder is now reserved.

This begs the question: are they no longer needed? They are not actually active ("loaded") on my system. Can anyone verify whether they are there on a pristine El Capitan install?

/Library/Extensions/ACS6x.kext
/Library/Extensions/ArcMSR.kext
/Library/Extensions/ATTOCelerityFC8.kext
/Library/Extensions/ATTOExpressSASHBA2.kext
/Library/Extensions/ATTOExpressSASRAID2.kext
/Library/Extensions/CalDigitHDProDrv.kext
/Library/Extensions/HighPointIOP.kext
/Library/Extensions/HighPointRR.kext
/Library/Extensions/PromiseSTEX.kext
/Library/Extensions/SoftRAID.kext

 

[leman]

I have them on my 10.11 system, which was a fresh install.

 

[KALLT]

In that case I should probably just leave them where they are.

 

[chrfr]

I noticed that there are several kernel extensions in /Library/Extensions that are neither made by Apple nor were they installed by me. I happen to have access to a Snow Leopard partition and I can see that most of these extensions are present in /System/Library/Extensions (except the first two below), but not in El Capitan anymore. I presume that these extensions were moved to /Library/Extensions upon installing El Capitan, given that the System folder is now reserved.

This begs the question: are they no longer needed? They are not actually active ("loaded") on my system. Can anyone verify whether they are there on a pristine El Capitan install?

/Library/Extensions/ACS6x.kext
/Library/Extensions/ArcMSR.kext
/Library/Extensions/ATTOCelerityFC8.kext
/Library/Extensions/ATTOExpressSASHBA2.kext
/Library/Extensions/ATTOExpressSASRAID2.kext
/Library/Extensions/CalDigitHDProDrv.kext
/Library/Extensions/HighPointIOP.kext
/Library/Extensions/HighPointRR.kext
/Library/Extensions/PromiseSTEX.kext
/Library/Extensions/SoftRAID.kext

Those have all gone into /Library/Extensions since at least 10.10. They are installed by the OS X installer.