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Code-signing requirements for scripts and apps in Big Sur

Does Big Sur require you to sign your own apps or other code using a proper Apple-issued signature? What about notarization and quarantine? Your questions answered.

February 18, 2021 Macs, Technology

When you don’t have permission to run an app on an M1 Mac

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You try to open an app on your M1 Mac, only to see an alert telling your that you don’t have permission to open it. Only that isn’t the reason.

January 26, 2021 Macs, Technology

Notarisation: privacy controls

Final in series. Examines how the hardened runtime controls access to protected private data and services, and how some use private entitlements.

January 8, 2021 Macs, Technology

Notarization: the hardened runtime

Second in the series. Considers in detail what the hardened environment offers the user, and how notarized apps can opt out of its protection.

January 7, 2021 Macs, Technology

Notarization: is a notarized app ‘safe’ to use?

First of three articles looking in detail at what notarization involves, and the benefits it might have to users. Considers the question of legacy apps.

January 5, 2021 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

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

Extended attributes as a vulnerability

Thirty years ago, many Macs were hit by the Wdef virus, which exploited a vulnerability which remains today: it travelled in an extended attribute. Should we be worried now?

November 7, 2020 Macs, Technology

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