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Software Update

How to install security updates without upgrading to Tahoe

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Want to stay running Sequoia or earlier? Want to install security updates such as XProtect data as well? Here’s how to do that without risking being upgraded unintentionally.

November 10, 2025 Macs, Technology

Explainer: How is XProtect’s data updated?

Until Sequoia, it was simply downloaded and installed as any other software update. Since then it has changed frequently and its behaviour can now confuse.

October 11, 2025 Macs, Technology

A brief history of content caching services

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Originally two separate services in Mac OS X Server, for Software Updates and later Content, it reached client versions of macOS in High Sierra in 2017.

September 27, 2025 Macs, Technology

Last Week on My Mac: Death, taxes and macOS updates

Users should be given a third option to defer updating further, as well as doing it now or later tonight. Does the DAS scheduling and dispatch system rely on security through obscurity too?

March 2, 2025 Macs, Technology

How your Mac can update macOS when you don’t want it to

I had left my Mac running near midnight. Next morning it had shut down in the middle of an unwanted macOS update. Here’s how macOS went against my express settings.

February 27, 2025 Macs, Technology

How iCloud can be simpler than a server

iCloud is now used for key services including notarization checks. For XProtect updates, it should be quicker and simpler, so long as you mind the pinniped.

December 20, 2024 Macs, Technology

XProtect has changed again in macOS Sequoia 15.2

There are no changes for Sonoma and earlier macOS, and Sequoia 15.0-15.1.1 will also continue working as before. But 15.2 and later work differently, as explained here.

December 19, 2024 Macs, Technology

A simple guide to how XProtect installs and updates in Sequoia

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You’ve just installed an update to XProtect in Sequoia, so why doesn’t it change the version number? How to fix this common problem.

October 10, 2024 Macs, Technology

How XProtect has changed in macOS Sequoia

Does XProtect confuse you in Sequoia? Do you know why it could show as version 0, 5273 or 5274? Here’s a guide to what I think is going on.

September 25, 2024 Macs, Technology

Last Week on my Mac: I told you so

If your Mac is running Sequoia, it could have no XProtect data at all, or being using version 5272 or 5273 but not 5274; if it’s running Sonoma or earlier, the version could be 5272 or 5274 but not 5273. Simple.

September 22, 2024 Macs, Technology

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