Mac.c Stealer is a malware family tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed December 23, 2025; most recent activity December 23, 2025.
Mac.c Stealer is a macOS-focused information-stealing malware family. Recent reporting describes a variant dubbed MacSync Stealer that can bypass macOS Gatekeeper security warnings, illustrating advanced evasion techniques and increasing the potential impact on Mac endpoints.
A new variant of the MacSync stealer malware has been identified, exploiting Apple's notarization process to bypass security measures on macOS devices. This malware poses a risk to sensitive user data by disguising…