If you own a Mac and still believe it’s naturally safe from serious malware, the latest data from Jamf will make you rethink that fast. Jamf’s Security 360: Annual Trends Report—released in April 2026—reveals that Mac trojan malware has now crossed 50% of all malware detections among monitored Apple devices. This is not a story about old threats from years ago. Every trend, every malware family, and every attack method flagged in this report is active, evolving, and targeting Mac users right now in 2026. The threat landscape has shifted dramatically, and the old “Macs don’t get viruses” comfort blanket is officially gone.
Jamf’s report is built on anonymized data from over 1.4 million Macs across 90 countries—one of the most comprehensive Mac security data sets available anywhere.
Why Mac Trojan Malware Exploded in 2025 and Carries Into 2026
The numbers are hard to ignore. Trojan malware went from just 16.61% of all Mac detections in 2024 to 50.32% in 2025 — a jump of more than 33 percentage points in a single year. That isn’t a blip. It’s a full structural shift in how attackers are approaching Apple devices, and the momentum is carrying straight into 2026 with no signs of slowing. One malware family sits at the center of this explosion: Atomic Stealer, also known as AMOS. It dominated both Trojan detections at 77.08% and infostealer detections at 78.49% simultaneously—the same family leading both charts at once tells you how deeply embedded it has become in the Mac threat ecosystem.
I’ve been following Mac security trends for a while, and honestly, seeing a single malware family sitting at the top of two completely separate malware categories in the same report is something I haven’t seen before. It shows that AMOS is not just widespread — it’s the backbone of the entire Mac malware economy right now.
What makes this especially relevant in 2026 is that Mac adoption in enterprises grew 16.4% between 2024 and 2025, according to the same Jamf report. More Macs in workplaces means more high-value targets for attackers. The criminal investment in Mac-targeting tools is directly proportional to how many Macs are now sitting in corporate environments, and that number keeps climbing.
The Delivery Methods That Make 2026 Mac Attacks Harder to Spot
The part of this story that most articles have missed is not the malware itself—it’s how it arrives. In 2026, Mac Trojan malware is being distributed through channels that most users would never suspect. AMOS has evolved far beyond sketchy download sites.
Cybercriminals have been using fake GitHub repositories disguised as legitimate apps like LastPass, 1Password, Dropbox, and Notion—pushing them to the top of search results through SEO poisoning. More alarming still, researchers discovered that poisoned AI chat conversations were being inserted directly into Google search results to trick macOS users into running malicious Terminal commands. Both ChatGPT and Grok interfaces were found to have been abused in these attacks.
After digging into this more closely, I can tell you that this AI-poisoning vector changes the game entirely. A user searching for something as harmless as “how to clear disk space on macOS” could be led through a seemingly legitimate AI-generated walkthrough that ends with their credentials being stolen. This is not a theoretical attack — it has been observed and documented in the wild heading into 2026.
Attackers have also refined how cracked software campaigns work. By March 2026, threat actors were hiding harmful instructions inside workflow files to misuse AI agents, showing a fake setup process that prompts the user for their password—completing the infection silently. The social engineering here is getting sharper, not weaker.
New Mac Malware Families That Emerged Going Into 2026
Beyond AMOS, Jamf’s Security 360 report specifically calls out several newly discovered Mac malware families that are active as of 2026 and deserve serious attention.
DigitStealer — Invisible to Antivirus Tools
Around November 2025, Jamf Threat Labs uncovered DigitStealer, a JXA-based infostealer that was completely undetected on VirusTotal at the time of discovery. What makes this malware particularly troubling for 2026 is a detail that barely made headlines: it uses hardware detection that restricts its execution to Apple Silicon M2 chips or newer. This is malware that specifically targets users running the latest Mac hardware — the most capable, most trusted devices in Apple’s current lineup.
MacSync Stealer — Bypassing Gatekeeper Entirely
MacSync Stealer represents a new benchmark in Mac attack sophistication. It has evolved beyond the social engineering tricks that relied on getting users to manually paste commands into Terminal. It now deploys through code-signed and notarized Swift applications — meaning it looks like a legitimate, Apple-approved app to macOS security systems. Gatekeeper, the built-in protection designed specifically to block unverified software, is bypassed because the malware arrives wearing an official-looking badge. Jamf describes this as “a broader trend where attackers disguise malicious code as legitimate applications to evade detection and bypass macOS security controls.”
The more I looked at this, the more it became clear that the real story wasn’t the one making headlines. Signed and notarized malware in 2026 doesn’t just bypass one security layer — it bypasses the entire trust model that Apple has built its security reputation on.
The Device Exposure Numbers That Should Worry Every Mac User in 2026
The Jamf report doesn’t just cover malware families—it maps out exactly how exposed Mac devices are right now. The findings are alarming across the board. Forty-four percent of devices using Jamf had malicious network traffic detected at some point. Forty-one percent have critically out-of-date operating systems, creating open windows that known malware families can walk straight through. Seventy-three percent of devices have at least one vulnerable app installed.
Honestly, the 73% figure is the one that hit hardest when I read through this. Nearly three-quarters of all monitored Macs are running at least one app with a known security vulnerability—in a threat environment where attackers are actively and specifically hunting for those exact gaps. Jamf also noted that roughly 50% of newly identified malware samples aren’t yet recognized by virus-checking software, meaning traditional antivirus tools would let them through without flagging anything.
What makes this a uniquely 2026 problem is the combination of factors. Adware — once neck and neck with infostealers at 28% of detections — has collapsed to just 5.06%. This is not good news. It reflects a deliberate shift in the malware economy: attackers have moved away from ad revenue toward data theft and credential harvesting. The crimes being committed against Mac users in 2026 are far more serious in consequence than the adware annoyances of years past.
What This Means for Mac Users and Enterprises Through the Rest of 2026
Sources suggest that the signing and notarization-based delivery trend pioneered by MacSync Stealer will be adopted by more malware families throughout 2026, making detection increasingly difficult without behavioral monitoring tools built specifically for macOS. Industry insiders also hint that as AI agents become more deeply embedded in macOS workflows, AI-poisoning delivery methods will continue to scale—they are simply too effective and too difficult to block with traditional controls.
For individual Mac users, the practical response is clear: keep macOS updated without delay, treat every unexpected Terminal command instruction with suspicion regardless of where it appears, and download software exclusively from the Mac App Store or verified official sources. If an app asks you to bypass Gatekeeper manually — stop immediately.
For enterprise IT teams managing Apple fleets, Jamf’s own recommendation is direct: security solutions must be built natively for macOS, not adapted from Windows-first platforms. Threat detection, compliance enforcement, and automated response need to be fully aligned with how Apple’s ecosystem actually operates. Zero-trust frameworks and automated OS update enforcement are no longer optional considerations — they are baseline requirements for any organization running Macs at scale in 2026.
Mac trojan malware isn’t a future threat to prepare for. It is a present reality that is already inside the networks and devices of millions of Apple users worldwide. The organizations and individuals who understand this shift now will be the ones who stay protected as this threat landscape continues to evolve through the rest of 2026 and beyond.
