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What happens in the log when an app crashes as it starts up?

How to investigate an app that crashes when starting up, using log entries. Includes detailed instructions for one of the simplest adventures in the log, and a summary of code signature errors.

May 29, 2026 Macs, Technology

Portraits of trees: Introduction

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Humans have lived with trees since our origins, and trees feature in many paintings. This explains the importance of sketching them from life, and shows examples of different species and contrasting artists from Rubens and van Ruisdael to van Gogh and Cézanne.

May 28, 2026 General, Life, Painting

How to fix an app that crashes as it starts up

When an app can only run for a moment, it might seem hard to work out why it crashes. Here are useful clues from the crash log and elsewhere to help you get the app running properly.

May 28, 2026 Macs, Technology

Apple has released an update to XProtect for all macOS

Apple has released its regular weekly update to XProtect for all versions of macOS, bringing it to version […]

May 27, 2026 Macs, Technology, Updates

On Reflection: Conclusions and contents

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Two groups of paintings: figures seen mostly in planar mirrors arranged vertically, and landscapes reflected by a horizontal water surface.

May 27, 2026 General, Life, Painting

Which tasks require mains power?

Some background tasks will only run when a laptop Mac is connected to mains (AC) power. This is also true for XProtect Remediator scans. What can you do to ensure these are still run?

May 27, 2026 Macs, Technology

Medium and message: Vast canvases

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Venetian walls were too damp for fresco, so their largest painting were made on stretched canvas. Those giants exceed 10 m (33 feet) in their longer dimension, with the largest 22 m (72 feet).

May 26, 2026 General, Life, Painting

Online reference to external displays for Apple silicon Macs

Not sure which Retina quality displays you can use with your Apple silicon Mac? This site has all the answers and more.

May 26, 2026 Macs, Technology

What’s in that phishing email?

When you need to check what’s in a potential phishing email, run a locked-down virtual machine for safety, as explained here.

May 26, 2026 Macs, Technology

Hero or hooligan: Theseus and Ariadne

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To enable Theseus to retrace his steps out of the Labyrinth, Ariadne gives him a ball of thread, in return for which he promises to marry her. Once the couple escape to the island of Naxos, Theseus abandons her and sails back to Athens.

May 25, 2026 General, Life, Painting

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