How to go about it ???

I've the SimpleFirewall Network extension from Apples' site. And I was able to get it to compile/configure and in working condition.

I was trying to do some XPC MSG exchange so I had to kill the /Library/SystemExention/6789... / my extension as well as deleted the folder.

Now with the same code ( original code of the extension ), I can not start the Firewall App anymore. There is no process running for the SystemExtension, and the /Library/SystemExtension folder is empty. ESSENTIALLY the start button does not start.

Q: Is there a sane way to clean system extension ?

How to debug the system extension using either Xcode or lldb command line ?

Thanks,

Prokash