Apps with extensions that won't work after Catalina

Start by deleting the three HP .kext files. You certainly don't need them, even if you are using an HP printer.

AppleMobileDevice is old and not used any more. It will probably be removed in the next macOS upgrade anyway. Leave it alone for now.

I don't know what SSIODriver is, but perhaps someone else does.

The reason is that a number of different products from different developers can use the same Extensions.

Determine which extensions are installed on your Mac, and then post them in a reply. They are located at /Library/Extensions/

Someone here is likely to help you identify the product using them.

Refer to the following Discussion: Legacy System Extensions

Kurt Lang wrote:

These ten are installed by macOS Catalina by default:

ACS6x.kext

ArcMSR.kext

ATTOCelerityFC8.kext

ATTOExpressSASHBA2.kext

ATTOExpressSASRAID2.kext

CalDigitHDProDrv.kext

HighPointIOP.kext

HighPointRR.kext

PromiseSTEX.kext

SoftRAID.kext

Describe the additional Extensions you installed on that Mac.

I overlooked that one but I believe it's an Apple .kext anyway. You can leave it alone also.