Display what services are loaded
launchctl list
Force a service to be launched

Fixes “nothing found to load”:

launchctl load -w -F [plist.file]
Add to init services, and start

Will always run:

launchctl load /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
Remove from init system
launchctl unload /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
Start a service manually
launchctl start /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
Stop a service
launchctl stop /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist


Unload and load a system service:

launchctl unload /System/Library/LaunchDaemons/org.apache.httpd.plist
launchctl load /System/Library/LaunchDaemons/org.apache.httpd.plist