Microsoft has issued a warning to millions of Apple users about a dangerous hacking threat that could compromise their private data. The threat, known as “HM Surf,” has reportedly been exploited already, giving attackers unauthorized access to a user’s protected data, including browsed webpages, the device’s camera, microphone, and location, all without the user’s knowledge. The hack targets macOS users, particularly those whose devices are managed via a mobile device management (MDM) setup, making it a greater risk for enterprise users.