How do automatic security updates work on macOS?

Question

How do automatic security updates work on macOS?

I bought a new MacBook that came with 15.2 installed. When I set it up, I couldn't log in with my Apple ID right away because I didn't have my phone with me for 2FA. As well, when I first booted, Software Update had an option to upgrade to 15.5, but I used it for a while (web browsing, installed a couple of apps, downloaded some ebooks, etc.) before doing that. I don't remember any other options for installing updates. Would macOS have automatically installed security patches on first boot, or am I at security risk because I didn't upgrade to 15.5 right away and/or didn't have my Apple ID linked for a couple of days? (Sorry if this is an odd question, I'm more used to the Windows model of security patching.)

[Re-Titled by Moderator]

Posted on May 29, 2025 11:57 AM

Reply

Answer 1

dialabrain

Level 10

137,461 points

May 29, 2025 2:52 PM in response to Community User

If there were security updates for 15.2 they would have been applied. There's zero reason for you to be concerned.

Reply

Answer 2

May 29, 2025 12:59 PM in response to Community User

macOS does not apply security patches outside of updates.

Anytime there's a patch it will be offered within a version of update shown in the Apple menu and in System Settings ➜ General ➜ Software Update.

If you did not update your Mac is vulnerable, but unlike Windows it's not going to be an open book. Patches usually fix targeted vulnerabilities where specific things have to happened and specific circumstances met for the vulnerability to be an issue.

You should have no issues currently simply because you did not immediately update.

Reply

Answer 3

leroydouglas

Level 10

203,542 points

May 29, 2025 5:02 PM in response to Community User

Could not agree more— worry about something else.

Always advise to stay current, realize you are running the latest macOS... so you are a few point updates behind, this is not going to bring down the house.

I always advise to stay current for bug fixes, security updates.

Anything pressing out of the norm gets taken care off:

Apple uses its Software Update service— as a mechanism for installing “background and critical” updates that are installed silently in the background with no notifications to the user.

See your Settings below, make changes to suit your needs; I do not know what is the default.

Reply

Answer 4

dialabrain

Level 10

137,461 points

May 29, 2025 2:42 PM in response to Community User

123A123B123C wrote:

I'm confused, then – since I posted, I did some more digging on the background updates (here: About background updates in macOS - Apple Support (CA)) and it says security updates are installed automatically by default.

The info in the link you posted is correct. Sequoia 15.5 is the current version.

Reply

Answer 5

May 29, 2025 1:03 PM in response to Phil0124

I'm confused, then – since I posted, I did some more digging on the background updates (here: About background updates in macOS - Apple Support (CA)) and it says security updates are installed automatically by default.

Reply

Answer 6

May 29, 2025 2:46 PM in response to dialabrain

Then would macOS have applied whatever security updates were available for 15.2 on first boot, or should I be concerned about some sort of possible security problem because I was using the machine before I upgraded to 15.5?

Reply

Answer 7

May 29, 2025 2:34 PM in response to Community User

And, when I checked Software Update right after first boot, the only update showing as available was the 15.5 upgrade – so am I misunderstanding?

Reply