Do Macs need antivirus?
Mostly no. But the threats changed, and the built-in tools didn't follow them.
I sell a Mac security app, so take this with that in mind. I'll still tell you straight: for classic viruses, your Mac does a good job on its own.
What macOS already does
| Built in | What it does |
|---|---|
| XProtect | Apple's own malware signatures. Updates in the background. |
| Gatekeeper | Blocks apps that aren't signed and checked by Apple, unless you override it. |
| Notarization | Apple scans developer apps for known malware before they can run cleanly. |
| SIP | Stops anything, even admin, from changing core system files. |
| FileVault | Encrypts your disk if the Mac is lost or stolen. |
Keep all of these on. Install macOS updates when they come. That alone handles most of what antivirus apps sell you.
Where it falls short in 2026
- Info-stealers. Mac stealers usually arrive as a fake app you approve yourself. Once you click past Gatekeeper's warning, you're leaning on XProtect to recognize it.
- Prompt injection. A hidden instruction in a PDF isn't malware. Nothing built in looks for it. See what prompt injection is.
- AI agents. macOS doesn't audit what you connected Claude Code or Cursor to. See MCP security.
- Scams. A cloned voice on the phone isn't a file. No scanner catches it. A family safe word does.
So what should you install?
If you download pirated apps or run a lot of unknown software, a classic antivirus earns its keep. For everyone else, the gap isn't viruses. It's the AI-era stuff above.
That's why Watchman isn't a virus scanner and doesn't pretend to be. It checks the six AI attack surfaces nothing else looks at, plus the basics like FileVault, firewall and startup items, all on your Mac. $49.99 once, no subscription.
Start with the full list in how to protect yourself against AI attacks.
Questions
Is XProtect enough?
It catches known Mac malware, and it works best when you keep macOS updated and never override Gatekeeper on an app you don't trust. It doesn't look at AI-era risks at all.
Can Macs get viruses?
Yes. Mac malware exists, mostly info-stealers and adware disguised as real apps. It's less common than on Windows, not absent.
Does Watchman replace antivirus?
No. It covers a different job: the AI-era attacks antivirus apps don't check for. Some people run both.
Check your Mac for AI-era attacks
Watchman runs six AI attack shields 100% on your Mac. No account, no uploads. $49.99 once, lifetime updates.
Buy for $49.99