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macOS and security updates in detail

Major macOS releases from Sierra to Ventura, with full details of each release and security update. Also updates to XProtect, MRT and Gatekeeper.

May 8, 2023 Macs, Technology

M-series Macs

For a systematic compilation of links to articles here about Apple silicon Macs, M1, M2, M3, M4 and […]

January 22, 2021 Macs, Technology

In memoriam Jean-Eugène Buland, painter of the Third Republic

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Challenging Naturalist paintings with equally challenging readings: a beggar giving his last coin, 5 hardened gamblers in a dive, a young apprentice making a cog, and a council group portrait.

March 18, 2026 General, Life, Painting

How macOS 26 Tahoe updates: 4 Download, preparation and installation

How a Content Caching Server can be used to supply an update. Preflight checks are extensive, and lead on to other preparation. Finally the boot chime is muted, and the Mac rebooted to allow installation.

March 18, 2026 Macs, Technology

Apple has just released the first Background Security Improvement for macOS Tahoe

Apple has just released its first public Background Security Improvement (BSI) for macOS 26.3.1 Tahoe, labelled as BSI […]

March 17, 2026 Macs, Technology, Updates

Apple has just released an update to XProtect for all macOS

Apple has just released its regular weekly update to XProtect, bringing it to version 5334. As usual it […]

March 17, 2026 Macs, Technology, Updates

Medium and Message: Oil studies

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Pairs of oil studies and finished paintings by Rubens, Géricault, Constable, Frith, Seurat, Eakins, Bierstadt and Cross.

March 17, 2026 General, Life, Painting

Who called git, and how Claude was caught red-handed

Two users confronted by a dialog to install command line developer tools so they can use git. Neither wanted to use git, but wondered which app could have triggered it. Despite its protestations, Claude knows only too well.

March 17, 2026 Macs, Technology

Jerusalem Delivered: 8 Rinaldo abducted by Armida

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The crusaders can’t replace their siege towers because the nearby wood is bewitched. Godfrey dispatches a party to retrieve Rinaldo, but he has been abducted by Armida.

March 16, 2026 General, Life, Painting

Solutions to Saturday Mac riddles 351

I hope you enjoyed Saturday’s Mac Riddles, episode 351. Here are my solutions to them. 1: Show for […]

March 16, 2026 General, Macs, Technology

How localisation confused SilentKnight 2.13

SilentKnight relies on the system_profiler command for much of the key information it needs. But that output is localised to the primary language in use at the time. This continues to cause problems.

March 16, 2026 Macs, Technology

A weekend with Misia: 2

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She married publishing magnate Alfred Edwards and cruised on their large yacht. In 1909 she divorced and married a Spanish painter, while being a major patron of Diaghilev and his Ballets Russes.

March 15, 2026 General, Life, Painting

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