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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

Hero or hooligan: Birth of Heracles

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The son of Zeus when he raped Alcmene, Hera delayed his birth to trap Heracles into being forced to undertake his 12 labours, then tried to kill the infant by putting serpents into his cradle.

August 24, 2026 General, Life, Painting

Solutions to Saturday Mac riddles 374

I hope you enjoyed Saturday’s Mac Riddles, episode 374. Here are my solutions to them. 1: Five flavours, […]

August 24, 2026 General, Macs, Technology

Aren’t snapshots purgeable?

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Snapshots made by Time Machine and tmutil should be purgeable, although sometimes they won’t purge, and aren’t shown reliably as purgeable space. An exploration of bugs and missing documentation.

August 24, 2026 Macs, Technology

Paintings of the English Channel coast 2

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From yachting in Cowes, moving east along the Channel coast to end at the extreme eastern tip of Kent, with paintings from William Dyce, Walter Sickert, Paul Nash, William Holman Hunt, William Powell Frith and others.

August 23, 2026 General, Life, Painting

Last Week on My Mac: Macs that go bump in the night

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If you leave your Mac running overnight, but not sleeping, what does it do? Does it perform maintenance tasks that it would otherwise have to do during the day?

August 23, 2026 Macs, Technology

Paintings of the English Channel coast 1

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A journey along the Channel coast from Land’s End in the far west, reaching the Isle of Wight, with Clarkson Stanfield, Thomas Girtin, John Brett, Paul Nash, JMW Turner and others.

August 22, 2026 General, Life, Painting

Saturday Mac riddles 374

Here are this weekend’s Mac riddles to entertain you through family time, shopping and recreation. 1: Five flavours, […]

August 22, 2026 General, Macs, Technology

Can DeltaFree help size your backup storage?

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Nine days of measurements of used space on a Time Machine backup storage drive. What does DeltaFree predict for its lifetime? How does used space change in containers in the internal SSD?

August 22, 2026 Macs, Technology

A cold countryside: James Ward 3

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His major painting of Wellington’s triumph fails and cost him dearly. Equestrian and dog portraits pay the bills, and his painterly oil sketches remain innovative.

August 21, 2026 General, Life, Painting

The arithmetic of free space

All APFS volumes in a single partition/container share its free space. How can that be measured? How much could be purged, and how do special file types affect it?

August 21, 2026 Macs, Technology

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