Gotcha!
Kidding. Arc is registered with launchd, Apple's daemon manager.
To halt Arc, unload it from launchd with
launchctl unload ~/Library/LaunchAgents/com.arc.arcd.plistKidding. Arc is registered with launchd, Apple's daemon manager.
To halt Arc, unload it from launchd with
launchctl unload ~/Library/LaunchAgents/com.arc.arcd.plistNo comments yet.