TLDR
Enter a command. For example: archey, universalaccessd, caffeinate.

launchctl

 
A command-line interface to Apple's launchd manager for launch daemons (system-wide services) and launch agents (per-user programs). launchd loads XML-based *.plist files placed in the appropriate locations, and runs the corresponding commands according to their defined schedule. More information: https://manned.org/launchctl.
 
  • Activate a user-specific agent to be loaded into launchd whenever the user logs in:
     
    launchctl load ~/Library/LaunchAgents/{{my_script}}.plist
     
  • Activate an agent which requires root privileges to run and/or should be loaded whenever any user logs in (note the absence of ~ in the path):
     
    sudo launchctl load /Library/LaunchAgents/{{root_script}}.plist
     
  • Activate a system-wide daemon to be loaded whenever the system boots up (even if no user logs in):
     
    sudo launchctl load /Library/LaunchDaemons/{{system_daemon}}.plist
     
  • Show all loaded agents/daemons, with the PID if the process they specify is currently running, and the exit code returned the last time they ran:
     
    launchctl list
     
  • Unload a currently loaded agent, e.g. to make changes (note: the plist file is automatically loaded into launchd after a reboot and/or logging in):
     
    launchctl unload ~/Library/LaunchAgents/{{my_script}}.plist
     
  • Manually run a known (loaded) agent/daemon, even if it is not the right time (note: this command uses the agent's label, rather than the filename):
     
    launchctl start {{my_script}}
     
  • Manually kill the process associated with a known agent/daemon, if it is running:
     
    launchctl stop {{my_script}}

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