Show HN: Someone Was Here – Find out who used your Mac while you were away

Someone Was Here is a free Mac app that uses facial recognition to photograph anyone who uses your Mac while you're away and sends alerts to your iPhone (for a $4.99 one-time fee). The app learns your face during setup to avoid alerting you about yourself, stores photos locally on your Mac, and displays no visible changes on screen when detecting activity. Photos are transmitted to your phone within seconds through iCloud or alternative services like Telegram or Pushover, with no tracking or ads involved.