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macOS 26

Last Week on My Mac: Update progress

Why isn’t the progress bar for macOS updates better? Why can’t it estimate the whole time remaining to complete an update?

March 29, 2026 Macs, Technology

Does disk storage speed limit macOS virtual machines?

In Ventura, VM disk performance was poor, with write speeds of 0.7 GB/s. How fast is it now in macOS 26.4, and how does using FileVault affect it? Plus a note on problems with BSIs in VMs.

March 27, 2026 Macs, Technology

What has changed in macOS Tahoe 26.4?

The update to bring macOS Tahoe up to version 26.4 is hefty at around 7.15 GB (more than […]

March 24, 2026 Macs, Technology, Updates

Apple has released macOS Tahoe 26.4, and security updates 15.7.5 and 14.8.5

Apple has released the update to bring macOS Tahoe to version 26.4, and security updates for Sequoia and […]

March 24, 2026 Macs, Technology, Updates

Disk image performance: the cost of encryption rises

The new ASIF disk image type is now 18 months old. How well does it perform? Is it as good as claimed? It all depends on whether you want to use encryption.

March 23, 2026 Macs, Technology

Last Week on My Mac: Brilliant engineering in a flawed interface

After an unfortunate incident three years ago, RSRs were put on pause. Now they’ve been rebadged as BSIs, what is wrong with their current implementation? The list is long.

March 22, 2026 Macs, Technology

What is a Background Security Improvement, and how does it work?

T T Read More

What is a BSI? Is it the same as an RSR? How does it patch vulnerabilities, and how is it installed and activated? What problems does it have, and what are its limitations?

March 19, 2026 Macs, Technology

SilentKnight 2.14 is ready for new firmware versions

T T Read More

An important update for those expecting to update Apple silicon Macs to 26.4, as older versions may crash, and are expected to report firmware version errors.

March 13, 2026 Macs, Technology, Updates

Apple has released macOS Tahoe 26.3.1

Apple has released an update to macOS Tahoe bringing it to version 26.3.1. This adds support for its […]

March 4, 2026 Macs, Technology, Updates

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

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