wifi接続の変更を監視してscriptを実行

launchctl

# root所有にしておかないと実行されない
sudo chown root ~/Library/LaunchAgents/me.tanb.sample.plist
sudo launchctl load ~/Library/LaunchAgents/me.tanb.sample.plist

me.tanb.sample.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>RunAtLoad</key>
  <true/>
  <key>Label</key>
  <string>me.tanb.sample</string>
  <key>ProgramArguments</key>
  <array>
    <string>/bin/bash</string>
    <string>/path/to/script.sh</string>
  </array>
  <key>StandardErrorPath</key>
  <string>/dev/null</string>
  <key>StandardOutPath</key>
  <string>/dev/null</string>
  <key>WatchPaths</key>
  <array>
    <string>/Library/Preferences/SystemConfiguration/com.apple.airport.preferences.plist</string>
    <string>/Library/Preferences/SystemConfiguration/com.apple.network.identification.plist</string>
  </array>
</dict>
</plist>