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How Monterey checks apps and executable code

There have been changes to the way that macOS 12 checks executable code when asked to run it. Summarised in a diagram.

March 4, 2022 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

Last Week on My Mac: Notarization arrives in 10.14.5

Apple provides detailed information about how to stunt your Mac’s performance to mitigate against MDS, but doesn’t mention how notarization has become mandatory, and can block extensions and apps from running.

May 19, 2019 Macs, Technology

AMFI: checking file integrity on your Mac

Apple Mobile File Integrity is a combination of a KEXT and a LaunchDaemon which check app signatures, entitlements, and provisioning profiles.

December 29, 2018 Macs, Technology
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