I had this vpn for a company I was working with that I later removed. Now I get a prompt that the legacy extension will not be supported in future mac OS. I don't use the software anymore and want to just find and remove the extension.
MacBook Pro 15″, macOS 10.15
Found what I was looking for in /Library/Extensions. For some reason the uninstaller left behind
drwxr-xr-x 3 root wheel 96B Apr 12 2019 PulseSecureFirewall.kext/
I really appreciate the guidance to help find and remove this. That app was updated to be fully dynamic in a browser session so the need for the locally installed app went away. It's frustrating when this stuff gets left behind.
Kernel extensions are installed to /Library/Extensions
Of those you find in this folder, the following are installed by the OS. Any others would have been added by third party software you installed.
ACS6x.kext
ArcMSR.kext
ATTOCelerityFC8.kext
ATTOExpressSASHBA2.kext
ATTOExpressSASRAID2.kext
CalDigitHDProDrv.kext
HighPointIOP.kext
HighPointRR.kext
PromiseSTEX.kext
SoftRAID.kext
This doesn't mean you should automatically disable all that don't match this list. There may be other extensions for third party software you use that need the extension(s) they installed. You'll have to try and figure out which one or more belonged specifically to the VPN software.
Kernel extensions should be installed in /Library/Extensions, but bad development behavior often installs them into /System/Library/Extensions instead. Can't remove those with a crowbar in Catalina due to the read-only filesystem.
Yes, there too! No idea why Apple allows developers to do that. etresoft explained in another topic how it's done.
I had tested VirtualBox and it put two extensions in the System folder. The only way to get rid of them (since their own uninstaller won't), is to boot to another Catalina volume and delete them from what is then the non-startup drive.
How to remove a legacy extension
