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macOS 26

Apple has just released updates to Golden Gate 27.0.1, 26.7.1 and 15.8.1

Apple has just released security updates bringing Golden Gate to 27.0.1, Tahoe to 26.7.1, and Sequoia to 15.8.1. […]

September 28, 2026 Macs, Technology, Updates

macOS Tahoe 26.4 changed boot volume structure

It turns out that macOS Tahoe 26.4 added a new folder and firmlinked it from the Data to System volumes, and it’s now seeing light use in Golden Gate.

September 19, 2026 Macs, Technology

Apple has released macOS Golden Gate, and security updates to Tahoe 26.7, Sequoia 15.8

Apple has now released the first public version of macOS 27.0 Golden Gate, together with security updates taking […]

September 14, 2026 Macs, Technology, Updates

How can you copy or restore keychains?

Login keychain behaviour changed in Tahoe 26.4, and now ties access to one Mac. That could cause problems, as the most reliable transfer is by two-Mac migration.

September 14, 2026 Macs, Technology

Prepare to update or upgrade macOS

Golden Gate, Tahoe 26.7 and Sequoia 15.8 are due to be released on Monday. What preparations should you make to update or upgrade your Mac?

September 10, 2026 Macs, Technology

What happens when a Mac’s boot volumes run out of space?

T T Read More

What happens when a Mac runs out of free space in the container of its boot volume group? This shows what you can expect to see, and what happens in the log.

September 7, 2026 Macs, Technology

Caches and purging in macOS Tahoe

Caching to disk improves performance, but cached data are optional and may be purged when additional free space is needed. This explains how that’s performed by the deleted service.

September 2, 2026 Macs, Technology

Golden Gate and forthcoming updates

Due for public release on or by 22 September, it should be accompanied by Tahoe 26.7 and Sequoia 15.8, and hopefully syncing of firmware versions.

August 28, 2026 Macs, Technology

Why can purging snapshots fail?

T T Read More

Further tests on two volumes with over 90 GB purgeable space. One took almost 30 minuted to become available, the other never got there at all. The log reveals who was responsible.

August 27, 2026 Macs, Technology

Aren’t snapshots purgeable?

T T Read More

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

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