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Gatekeeper

Why is my Mac’s Gatekeeper data so out of date?

When you check the version of Gatekeeper data on a new Mac, why should it show one which was pushed by Apple nearly 5 years ago for El Capitan?

March 6, 2021 Macs, Technology

Silently updated security data files in Big Sur

Details of data files for MRT, XProtect, Gatekeeper and other security features in Big Sur. Covers both Intel and M1 Macs.

December 14, 2020 Macs, Technology

macOS has checked app signatures online for over 2 years

Why does it take 2 years to realise that macOS has been checking signing certificate validity online?

November 25, 2020 Macs, Technology

How Big Sur checks Universal Apps

If you were to strip unwanted code from a Universal App, would it still pass Big Sur’s strict security checks?

November 23, 2020 Macs, Technology

How to move Apple Installers around via AirDrop

AirDrop is very convenient, but sets the quarantine flag, which can break Apple’s installer apps. Here’s how to remove those flags in a couple of minutes.

November 21, 2020 Macs, Technology

Getting unnotarized apps out of quarantine

How Catalina and Big Sur handle the first run of apps which have their quarantine flag set. With details of log entries seen in both steps needed for approval.

November 19, 2020 Macs, Technology

Checks on executable code in Catalina and Big Sur: a first draft

How macOS checks executable code before it’s loaded and run, in macOS 10.15 and 11.0. Covering integrity checks using hashes, and validity of the signing certificate, on Intel and ARM.

November 16, 2020 Macs, Technology

Last Week on My Mac: Making essential services fail-safe

Although most were worried about Apple’s failure to deliver upgrades to Big Sur, the most serious problem left many users unable to launch any apps.

November 15, 2020 Macs, Technology

Quarantine and the quarantine flag

Most quarantine flags in your Mac aren’t on apps but documents. Details of how they’re added, what info they contain, and what they do.

October 29, 2020 Macs, Technology

XProtect: What do we know about it?

Where to find its data files, what each contains and does, when XProtect is called to scan software, and a list of known malware it should detect.

October 27, 2020 Macs, Technology

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