MacSync Malware Bypasses macOS Gatekeeper with Notarized Infostealer in 2024
In June 2024, security researchers identified a new MacSync infostealer variant targeting macOS devices. The malware is delivered through a digitally signed and notarized Swift application that successfully evades Apple’s Gatekeeper checks, allowing it to run without typical security warnings. Once executed, MacSync exfiltrates sensitive user information including credentials, browser data, and files—leveraging encrypted command-and-control channels to avoid detection. The sophisticated dropper uses advanced evasion techniques to bypass standard macOS security controls, elevating risks for individuals and organizations running unpatched systems. This attack illustrates an evolving landscape where threat actors exploit trusted developer channels and novel evasion tactics to compromise macOS environments. With the growing adoption of macOS in enterprise and remote work settings, organizations are urged to review their controls, respond proactively, and address malware risks that legacy security tools may not detect.
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