Launchctl load

• launchctl load /System/Library/LaunchDaemons/com.apple.screensharing.plist
• launchctl load -w /System/Library/LaunchDaemons/ssh.plist

launchctl load --help
Usage: launchctl load <service-path, service-path2, ...>
        -w      If the service is disabled, it will be enabled. In previous
                versions of launchd, being disabled meant that a service was
                not loaded. Now, services are always loaded. If a service is
                disabled, launchd does not advertise its service endpoints
                (sockets, Mach ports, etc.).
        -F      Forcibly load the service. This flag will ignore the service's
                disabled state. In previous versions of launchd, this flag
                would also ignore the ownership and permissions of the
                specified launchd.plist. This is no longer the case. Note that,
                unlike the -w flag, this flag will not  modify the service's
                disabled state; it will instead only ignore it for the load
                operation.
        -S <session>
                This flag takes a single argument which is the name of a
                session and may only be used when loading agents. All daemons
                exist within the same session, which is the system session.
                Agents may designate which sessions they can be loaded in with
                the LimitLoadToSessionType key.
        -D <domain>
                Loads launchd.plist(5) files from the specified domain.
                Depending on the current execution context, launchctl will look
                in a LaunchDaemons or LaunchAgents directory for
                launchd.plists. When running in the system's execution context
                (i.e. when run as root via a root shell or with sudo), the
                LaunchDaemons directory is searched. When running in a user's
                context (i.e. run normally from a shell), the LaunchAgents
                directory is searched. Valid domains are:
                system
                Searches /System/Library for either daemons or agents.

                local
                Searches /Library for either daemons or agents.

                network
                Searches /Network. This session type is no longer valid.

                user
                Searches the home directory of the calling user for agents
                only. Daemons may not be loaded from this
                domain.

See also

• launchctl, launchctl unload, launchctl load, launchctl list, launchctl start, launchctl stop, /System/Library/LaunchDaemons/, launchctl stop com.openssh.sshd, launchctl bootout, /System/Library/LaunchDaemons/ssh.plist