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Tahoe

New build of SilentKnight 2.12 for Tahoe 26.4 beta testers

If you are testing beta-releases of macOS 26.4 Tahoe on Apple silicon Macs, please use this new build of SilentKnight, version 2.12 build 61, as it shouldn’t crash.

March 4, 2026 Macs, Technology, Updates

Does Safe mode check the startup disk?

Safe mode is claimed to do 3 things: block 3rd party extensions, clear caches, and check your startup disk. But what disk checks does it really make, and how are they different?

March 3, 2026 Macs, Technology

How macOS 26 Tahoe updates 1

How macOS 26.2 updated to 26.3, variation in download sizes, how macOS works out free space requirements to proceed with the update, and its sequence of stages run by a finite state machine.

March 2, 2026 Macs, Technology

Last Week on My Mac: Bugs of wonder

Why should an app start crashing on launch in macOS 26.4 beta 2? Why does its firmware version number make no sense? And how did it take 6 months to fix six typos?

March 1, 2026 Macs, Technology

Last Week on My Mac: Repair Assistant has replaced Diagnostics

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Last September, Tahoe replaced Apple Diagnostics with a new and improved suite of tests for Apple silicon Macs. No one seems to have noticed, least of all Apple.

February 15, 2026 Macs, Technology

What has changed in macOS Tahoe 26.3?

For once, Apple’s bland statement that “this update provides important bug fixes and security updates” may be the […]

February 11, 2026 Macs, Technology, Updates

Apple has released macOS Tahoe 26.3, and security updates in Sequoia 15.7.4 & Sonoma 14.8.4

Apple has released updates to macOS, to bring Tahoe to version 26.3, and security updates for Sequoia to […]

February 11, 2026 Macs, Technology, Updates

macOS Tahoe no longer fully supports Time Capsules

If you’ve upgraded to Tahoe, your Time Capsule should still back up normally. But erase it to start new backups, and Time Machine refuses to back up to it any more.

February 11, 2026 Macs, Technology

How does an Apple silicon Mac tell the time?

Apple silicon Macs may not obtain an external reference time for many seconds after starting up. Do they adjust their local clock over that period, and if so, against what reference?

January 29, 2026 Macs, Technology

Which cryptexes does macOS Tahoe load?

Which system and AI cryptexes are loaded during macOS boot? Here are details of the 28 for AI in Tahoe 26.2, and which are new since Sequoia 15.5.

January 19, 2026 Macs, Technology

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