#MACS

The Eclectic Light Companyeclecticlight.co@web.brid.gy
2025-12-22
<p>The internal SSD in an Apple silicon Mac normally contains at least a dozen volumes, carefully arranged into three partitions or containers. If you think that&#8217;s confusing, you&#8217;re not alone. This bug demonstrates how the Finder can&#8217;t cope either, and when it should be unmounting just one of those, it tries to get rid of the lot. This goes back to Ventura at least, and I suspect has been present since 2019, when Catalina brought this complex boot disk structure.</p>
<p>The reason that it&#8217;s seldom encountered is that it depends on adding another volume to those on the internal SSD. That has been unusual until recently, when <a href="https://eclecticlight.co/2025/05/28/save-space-on-the-internal-ssd-by-adding-another-volume/">it&#8217;s been shown</a> to be a good way to store large files such as Virtual Machines without resulting in huge snapshots.</p>
<h4>Trigger the bug</h4>
<p>The key requirement to reproduce this bug is an extra APFS volume added to the internal SSD, as <a href="https://eclecticlight.co/2025/05/28/save-space-on-the-internal-ssd-by-adding-another-volume/">detailed here</a>:</p>
<ol>
<li>Open Disk Utility, and in the list of volumes on the left, select the Data volume in the internal SSD.</li>
<li>Click the + tool in the toolbar to add a new volume, and set its format to either APFS or APFS (Encrypted). Disk Utility should then add that new volume, and the Finder display it in the sidebar of its windows.</li>
<li>Control-click on tha
2025-12-19

💫 Look back at 2025 with us with our year-end newsletter!
This edition brings together a few snapshots of the efforts and solutions we are part of, inc.:
🟢 a global initiative to mobilise support for environmental human rights defenders #LEADInitiative,
🔵 new guide on how to do innovation right with Fundamental Rights Impact Assessments #FRIAs,
🟡 the monitoring tools we power: #MACS and #CSOMeter...and much more.

Read and sign up for 2026: mailchi.mp/ecnl/2025-in-review

ECNL newsletter
2025-12-16

On this episode of For Mac Eyes Only: Mike, Eric and Darren dive into their sack of holiday gift ideas and share some favorite last minute gift picks for the Apple user in your life.

#GiftGuide #Gifts #Hardware #Holiday #Macs #Software
formaceyesonly.com/2025/12/15/

The Eclectic Light Companyeclecticlight.co@web.brid.gy
2025-12-15
<p>Several of my utilities rely on being able to read log entries from your Mac. For most, this is the only way that you&#8217;re ever going to try to access the log. For a few this draws attention to potential problems, when the app discovers it can&#8217;t access the log and reports that as an error. This article explains what those errors mean, and what you can do to address them.</p>
<h4>Log file layout</h4>
<p>Files containing log entries are stored in two main locations in your Mac&#8217;s Data volume. The majority of them are in /var/db/diagnostics/, while additional and lengthier log data is stored in files named by UUID in /var/db/uuidtext/.</p>
<p><span class="alignnone"><img alt="logcat01" class="alignnone size-full wp-image-46070" src="https://eclecticlight.co/wp-content/uploads/2019/10/logcat01.jpg?w=940" /></span></p>
<p>Those in /var/db/diagnostics/ are grouped into standard folders:</p>
<ul>
<li><strong>Persist</strong> holds tracev3 files that contain regular entries, the most important;</li>
<li><strong>Special</strong> has similar files for shorter-life entries;</li>
<li><strong>timesync</strong> contains files that enable the entries in tracev3 files to be matched with clock time;</li>
<li><strong>Signpost</strong> holds tracev3 files for special entries for measuring performance;</li>
<li><strong>HighVolume</strong> is normally empty, but might contain entries during periods when they&#8217;re particularly frequent.</li>
</ul>
<p>Unlike traditional Unix l
The Eclectic Light Companyeclecticlight.co@web.brid.gy
2025-12-14
<p>I suppose it had to happen that search engines and AI were exploited to <a href="https://eclecticlight.co/2025/12/11/how-online-search-and-ai-can-install-malware/">deliver malware</a> to the unsuspecting. As that article prompted a brief discussion of the usefulness and reliability of AI-based troubleshooting, I&#8217;ve been doing a little checking.</p>
<p>To examine this, I&#8217;ve posed Google&#8217;s AI some test questions. Rather than run through a long list, I&#8217;ve focussed on five that are reasonably frequent but have catches in them. Some are embedded in the question itself, others are inherent in the solution. My aim here isn&#8217;t to focus on the strengths of AI, but to understand its weaknesses better, just as you might with a human expert. After all, it doesn&#8217;t take much expertise to get the straightforward answers right.</p>
<h4>1. How to reduce system data on mac</h4>
<p>This question is framed carefully to reveal that the questioner has already used Storage settings, and has been confronted with a great deal of space being used by System Data, an unhelpful category and a situation that&#8217;s all too common, as I&#8217;ve <a href="https://eclecticlight.co/2025/02/11/what-is-system-data-in-storage-settings/">considered here</a> and elsewhere.</p>
<p>Google&#8217;s overview started well, telling me that &#8220;System Data includes caches, logs, and temporary files that build up over time and aren&#8217;t easily removable like regular documents.&#
The Eclectic Light Companyeclecticlight.co@web.brid.gy
2025-12-12
<p>Apple has just released the update to bring macOS Tahoe to version 26.2, and security updates to Sequoia and Sonoma to bring them to 15.7.3 and 14.8.3 respectively. The latter two should also have associated Safari updates.</p>
<p>The update to 26.2 is about 3.78 GB to download to an Apple silicon Mac, and 2.5 GB for an Intel Mac. Some Macs may require larger downloads, though, with some in excess of 10 GB.</p>
<p>Tahoe 26.2 introduces Edge Light to light your face during low-light video calls, improves Podcasts with automatic chapter generation, adds filters to the Games library, adds AirDrop codes as an additional verification with unknown contacts, enhances Freeform tables, and more. Fuller release notes are <a href="https://support.apple.com/en-us/122868" target="_blank">available here</a>, and are a significant improvement in themselves.</p>
<p>Security release notes <a href="https://support.apple.com/en-us/125886" target="_blank">for Tahoe</a> report a total of 46 vulnerabilities addressed. Among them are multiple WebKit vulnerabilities, including two that Apple believes have been exploited already &#8220;in an extremely sophisticated attack against specific targeted individuals&#8221; in earlier versions of iOS. Notes <a href="https://support.apple.com/en-us/125887" target="_blank">for Sequoia</a> list 25, and those <a href="https://support.apple.com/en-us/125888" target="_blank">for Sonoma</a> 21. The <a href="https://support.apple.com/en-us/125892" target="_blank"

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