To uninstall Atom on macOS, run the following commands from the command line:
rm -rf ~/.atom rm -rf /usr/local/bin/atom rm -rf /usr/local/bin/apm rm -rf /Applications/Atom.app rm -rf ~/Library/Preferences/com.github.atom.plist rm -rf "~/Library/Application Support/com.github.atom.ShipIt" rm -rf "~/Library/Application Support/Atom" rm -rf "~/Library/Saved Application State/com.github.atom.savedState" rm -rf ~/Library/Caches/com.github.atom rm -rf ~/Library/Caches/Atom