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

Someone Was Here 是一款 Mac App Store 免费应用，当有人在你离开后使用 Mac、尝试锁屏或解锁时，它会拍下对方照片，并在几秒内通过免费 iPhone 应用经你自己的 iCloud 推送到手机。