Mac launchd

External

• https://developer.apple.com/library/content/documentation/MacOSX/Conceptual/BPSystemStartup/Chapters/CreatingLaunchdJobs.html

Internal

• Mac

Organizatorium

System httpd keeps starting in foreground

I fixed with:

launchctl unload -w /System/Library/LaunchDaemons/org.apache.httpd.plist

but I don't know what determined it to suddenly start, and why the above command worked.