A new flaw every day.
Is your Mac exposed?
Tech leaders are calling it code red. Mac Shield checks your Mac against today’s threats in one click, then tells you exactly what to do.
Every check free, with every result
macOS 14 Sonoma or later
Apple silicon and Intel, notarized by Apple
Today’s threats
Updated 38 minutes ago Signed feed
- macOS security updatesEvery Mac.Security update
- Brotli (HTTP2Shell)Matters for Node.js, Python's Brotli packages, and Homebrew's Brotli library, which Homebrew's curl uses.In the news
- PHP2ShellMatters if PHP is installed on your Mac, for example for local web development.In the news
- CoreGraphics flaw used in targeted attacksEvery Mac still on an affected version.Attackers are using this
- Chrome flaw used in attacks (JavaScript engine)Chrome and other Chromium browsers, and apps built on Electron or Chromium.Attackers are using this
20 advisories in the Briefing.
13 are flaws attackers are using.
The people who run the internet are sounding the alarm.
In one week of October 2026, the security chief at Anthropic, the CEOs of Salesforce and Cloudflare, and OpenAI all warned that it gets worse before it gets better.
“as bad as things have gotten in the past 4 days, they are going to get a lot worse before they get better. security leaders, never let a crisis go to waste: please go to your boards and ask for help right now. not for ai, for the basics. (we need to hold on for ~18 months.)”
“Jason is 100% right. Code red.”
“This one maybe as bad or worse than the PHP ones. Get used to lots of patching.”
“The vulnerability tsunami is coming in just a few months and there won’t be enough time to patch critical infrastructure.”
“The flaw could let an attacker run their own code on affected systems by sending or replying with malicious compressed data, without any need to create a user account.”
Quoted word for word from public posts on X. None of these people or companies is affiliated with Mac Shield or endorses it.
Most of these flaws live on servers, and the companies that run them have to patch. But this fall also brought flaws in macOS and Chrome that attackers are already using. The hard part is knowing which headline is yours.
From headline to your Mac in one click.
Pick a headline from the Briefing. Mac Shield checks it against everything installed and tells you whether to act or to relax.
- The headline
Chrome flaw used in attacks (JavaScript engine)
A booby-trapped web page can run code on your Mac. Google says an exploit exists in the wild. Fixed in Chrome 153.0.8010.36.
- Checking the apps on this Mac
- Google Chrome 152.0.7977.82Behind
- Slack, built on Electron 41Behind
- Visual Studio Code, built on Electron 45Up to date
- Safari 27.2Not affected
- The answer
Press “What about my Mac?” to see the answer.
Affects this Mac2 apps need an update
Update Chrome to 153.0.8010.36, then update Slack. Each app carries its own copy of Chrome’s engine, so each one updates separately.
- The headline
PHP2Shell
Two flaws in PHP let anyone on the internet run code on a server that uses PHP. About 70% of websites run PHP.
- Looking for PHP on this Mac
- Homebrew packagesNo PHP
- Apps and their bundled toolsNo PHP
- Developer tools in your foldersNo PHP
- The answer
Press “What about my Mac?” to see the answer.
Not this MacNothing to do
PHP isn’t installed on this Mac. The websites you use have to patch their own servers, and nothing on your Mac changes that.
A demo with example apps. Mac Shield checks the ones on your Mac, on your Mac.
Smart Check answers the question.
You get one number, how many things need you, and a list of exactly what to do, ranked by what attackers are actually using right now.
- Today’s advisoriesYour apps, browsers and developer tools against the latest flaws.
- Updates waitingEvery one, with security fixes first.
- Open doorsServices on your Mac that other devices can reach.
- Stealer signsThe tricks password-stealing malware relies on.
- Built-in protectionFileVault, the firewall, Gatekeeper and more.
- Apple’s signaturesKnown Mac malware, found on purpose.
- Update Slack.Attackers are using this
Its built-in browser engine is behind on a flaw being exploited right now.
- Turn on the firewall.Setting
It keeps uninvited connections out. One button opens the setting.
- Remote Login is on.Open door
Other devices on this network can reach it. Switch it off if you don’t use it.
An illustration of how results read. Mac Shield shows what it found on your Mac, and nothing leaves it.
Headlines don’t wait for you to check.
You never pay to see what Mac Shield found on your Mac, and every check is free. Pro checks for you every 6 hours and warns you the moment a new threat affects your Mac.
Free
$0Every check, with its full results. Forever.
- Every check, and every result in full
- The live, signed Briefing
- Every Mac Shield update
- Code Red: lock down and restore, always
Mac Shield Pro
$5/month or $30/year. One subscription covers 2 Macs.
- Background checks. A quiet Smart Check every six hours, telling you only about what’s new.
- Paste Guard. Warns when a command you copied would download and run something, and offers to check GitHub repos before you clone them.
- Clipboard Guard. Warns the moment a crypto address you copied is swapped for someone else’s.
- Stealer Watch. Tells you when something new sets itself up to start with your Mac.
Also Clone checks, new-device and new-connection alerts, watched wallets, 30-day history and one-click fixes.
Try Pro free for 7 days in the app, no card needed.
Built for the threats Mac users actually face.
AI coding, crypto, clipboard hijackers and paste-this-command scams, alongside the basics every Mac needs.
Check
Know where you stand
Protect
Close the ways in
Watch
See what’s happening
Emergency
When it all goes wrong
One button when it all goes wrong.
Think you’ve been hacked? Code Red takes your Mac off the network while you sort things out, keeps Apple’s security updates flowing, and restores everything when you’re ready.
Code Red is always free. Locking down in an emergency should never be behind a paywall.
How Code Red works
Check your Mac before the next headline.
Free to download, with every result.
Version 1.0.1, Oct 26
macOS 14 Sonoma or later
Apple silicon and Intel, notarized by Apple