I need to copy "Network Diagnostics.app" into the Mojave Core Services library.
Running "csrutil disable" from terminal doesn't work, says you have to run from Recovery OS. I don't know if I have Recovery OS or not, only Mojave is installed.
Giving Finder "Full Disk Access" under "Security and Privacy" threw errors when I tried to copy the file (a circle with a line through it appeared when I tried to drag and drop).
Giving muCommander (a 3rd-party freeware file manager) Full Disk Access didn't work either, "unable to write to directory" error.
I read that this can be done through the command line, what would the syntax be? Is this correct:
sudo cp \Desktop\"Network Diagnostics.app\MacintoshHD\System\Library\CoreServices\Applications\
Seems strange that I can't run a program as Administrator, but I understand this was a deliberate decision by Apple. Is there a way to accomplish this?