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Security Bite: Trojan malware dominates Mac, now half of all detections, says Jamf

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Why This Matters

The rise of trojan malware on Macs, now accounting for half of all detections, highlights a growing cybersecurity threat that impacts both consumers and businesses. This shift underscores the need for enhanced security measures and vigilant management of macOS devices to prevent data breaches and malware infections.

Key Takeaways

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Each year, Jamf—the popular Apple device management platform—releases its Security 360: Annual Trends Report, which gives a broad outlook of the macOS threat landscape currently facing businesses and users. The analysis uses anonymized real-world data collected from over 1.4 million Macs across 90 countries with Jamf software installed.

Now, Jamf is out with its latest edition, which uses data spanning the prior 12 months in 2025. The report offers many notable insights into what its seeing among customers, most interestingly the complete dominance of trojan malware, which even top infostealers, increased over 33% since Jamf’s 2024 outlook.

Key findings

50% of all malware affecting Mac were trojans, up over 33% since 2024

44% of devices using Jamf had malicious network traffic

41% of devices have critically out-of-date operating systems

73% of devices have at least one vulnerable app installed

Trojans exploded, knocking off infostealers as top type

Let’s start with the biggest finding form Jamf’s latest 360 report: trojans. This particular type of malware went from 16.61% of total detections among Jamf customers in 2024 to 50.32% in 2025, a huge jump of over 33 percentage points.

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