Do Macs Need Antivirus in 2026?

Mac malware exists and has grown steadily. What has changed is its shape. The self-replicating virus that antivirus software was built to catch is almost extinct on macOS. What replaced it is adware, browser hijackers, and credential stealers that arrive because a user was persuaded to install them.

What macOS already does for you

Apple ships four layers, and most people don't realise how much they cover.

• Gatekeeper checks that an app is signed by an identified developer and has been notarised by Apple before it'll open.
• Notarisation means Apple has already scanned the binary for known malicious content.
• XProtect is signature-based malware blocking built into macOS. It updates silently, separately from system updates.
• XProtect Remediator actively scans for and removes known malware families, running quietly in the background.

That is a real antivirus stack. It is already on your Mac, it is free, and it updates without you. Most third-party products duplicate a good portion of it.

Where that stack falls short

Apple's defences are strongest against unknown binaries arriving from the internet. They are weakest in three places.

You approved it yourself

The dominant infection route on macOS today is a user being talked into installing something. A fake Flash update, a cracked application, a "your Mac is infected" popup, a malicious browser extension. Gatekeeper asked, and the user said yes. No scanner overrides consent.

Infostealers move faster than signatures

Families like Atomic Stealer are distributed through fake app downloads and malicious ads, and they're repackaged constantly. They target browser cookies, saved passwords, and crypto wallets. Signature-based blocking is always slightly behind a threat that changes weekly.

Adware isn't technically malware

Browser hijackers, search redirectors and bundled "helpers" often sit in a grey area where they aren't clearly malicious enough to be blocked, yet clearly unwanted. XProtect largely leaves these alone. They are also the single most common real complaint from Mac users.

How to check your Mac for malware

If you want to scan a Mac or MacBook for malware without installing anything, these five checks find nearly everything that matters.

1. Browser extensions. The most common home for hijackers. Remove anything you don't remember installing.
2. Launch agents and daemons. How malware persists across reboots. See our guide to launch agents.
3. Login items in System Settings, General, Login Items.
4. Configuration profiles. Under Privacy and Security. A profile you didn't install is a serious red flag, and this is a favourite trick of browser hijackers because it survives normal cleanup.
5. Outbound network connections. Software that phones home to somewhere unexpected is worth investigating.

Signs that indicate infection

Ignore anything that told you via a web popup. Real indicators look like this:

• Your browser homepage or search engine changed by itself and reverts when you change it back.
• Adverts appear in places that never had them, including inside apps.
• An app you don't recognise launches at startup.
• Your Mac runs hot and the fans spin with no application open, which can indicate cryptomining.
• A configuration profile is installed that you didn't add.

Notably absent from that list: a slow Mac. Slowness is almost never malware. It is usually one of the five ordinary causes.

So, yes or no?

For most people, running a permanent third-party antivirus on a Mac is unnecessary. XProtect and Gatekeeper handle the class of threat those products were designed for.

What helps is periodic visibility. Knowing what persists at startup, what your browser is running, and what your Mac talks to over the network catches the things that get onto Macs in 2026. That is an audit, not a resident scanner, and it is a different product category to the one being advertised at you.