Lockdown Mode is the most aggressive security setting Apple has ever shipped. It was built for a very small group of people who are realistically targeted by mercenary spyware — the kind of six-figure, government-grade attacks aimed at journalists, activists, diplomats, and executives. For everyone else it is overkill, and it deliberately breaks features you use every day.
This guide explains what Lockdown Mode actually does, how to turn it on and off in about a minute, and how to decide honestly whether it belongs on your Mac.
What Lockdown Mode is (and is not)
Lockdown Mode is not antivirus and it is not a firewall. It does not scan for malware or block network ports. Instead, it shrinks the attack surface of your Mac by switching off complex, rarely used features that sophisticated spyware exploits to break in — things like certain message attachment types, some web technologies, and wired accessory connections.
Think of it as bolting shut the windows and side doors of your house because you are worried about a professional break-in artist, accepting that you will now have to use the front door for everything. Apple is explicit that it is not for typical users: almost no one is targeted by the attacks it defends against.
What Lockdown Mode turns off
When you enable it, macOS applies protections that noticeably change how the Mac behaves:
- Messages: Most attachment types other than images are blocked, and features like link previews are turned off.
- Web browsing: Safari disables some complex web technologies (such as just-in-time JavaScript), so certain sites load slower or break. You can allow trusted sites individually.
- Apple services: Incoming invitations and service requests — including FaceTime calls from people you have not messaged before — are blocked.
- Wired accessories: A Mac will not connect to accessories or another computer over USB or Thunderbolt unless it is unlocked and you approve the connection.
- Configuration profiles: You cannot install configuration profiles, and the Mac cannot be enrolled into device management while Lockdown Mode is on.
How to enable Lockdown Mode on a Mac
It takes under a minute and requires a restart. On macOS Ventura or later:
- Open System Settings (the Apple menu → System Settings).
- Click Privacy & Security in the sidebar.
- Scroll to the bottom and find Lockdown Mode. Click Turn On.
- Confirm, enter your password if asked, then click Turn On & Restart.
- Your Mac restarts with Lockdown Mode active. Repeat these steps on your iPhone and iPad if you want the same protection there — Apple recommends enabling it on all your Apple devices together.
How to turn Lockdown Mode off
If it gets in your way, turning it off is just as quick: System Settings → Privacy & Security → Lockdown Mode → Turn Off, confirm, and restart. Nothing is permanently changed — your Mac returns to normal behavior after the restart.
Do you actually need Lockdown Mode?
For the overwhelming majority of people, the honest answer is no. Mercenary spyware is expensive and narrowly targeted; it is not sprayed at the general public. If you are a journalist covering hostile governments, a human-rights activist, a diplomat, or a high-profile executive who has been specifically warned you may be targeted, Lockdown Mode is a reasonable and free layer to add. If none of that describes you, the everyday basics protect you far more for far less friction.
Those basics matter more than any single toggle:
- Keep macOS updated. The single biggest real-world risk is a Mac that stopped getting security updates. See how to update macOS, and read do Macs get viruses? for what actually infects Macs today.
- Turn on FileVault. Full-disk encryption protects your data if the Mac is lost or stolen — how to turn on FileVault.
- Enable the firewall if you use public Wi-Fi — how to enable the firewall on a Mac.
- Protect against theft with Find My and Activation Lock — how to protect a MacBook from theft.
One more note on the update point: Lockdown Mode only exists on macOS Ventura and later, and it depends on ongoing Apple security patches to stay effective. If your Mac is too old to run a supported macOS, no toggle can fully protect it. A newer refurbished Mac that still receives updates is often a better security decision than an aging model — you can find supported, price-checked options on our Apple clearance page.
Frequently asked questions
Does Lockdown Mode make my Mac slower?
Not in a general sense. It does not throttle the processor. Some websites load slower because Safari disables certain performance features, and a few apps or attachment types stop working, but day-to-day speed is unchanged.
Will Lockdown Mode break my apps?
It can. Messages attachments, some websites, FaceTime invites from strangers, and wired accessory connections are the most common things people notice. You can exclude specific websites in Safari, and you can turn Lockdown Mode off at any time.
Is Lockdown Mode a replacement for antivirus?
No. It reduces the attack surface for targeted spyware but does not scan for or remove malware. For most people, keeping macOS updated does more than antivirus — see do Macs get viruses?
What macOS versions support Lockdown Mode?
macOS Ventura (13) and later. It is also available on recent versions of iOS and iPadOS, and Apple recommends enabling it on all your devices at once.
Should a regular home user turn on Lockdown Mode?
Almost certainly not. Apple designed it for the small number of people at risk of highly targeted attacks. Regular users are far better served by updates, FileVault, the firewall, and good password habits.