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Apple silicon

Prepare to upgrade macOS

Are you intending to upgrade to Tahoe on Monday? Or to Sequoia or Sonoma? Are you ready to cope with what could go wrong? Here are some tips to help you prepare.

September 11, 2025 Macs, Technology

Command tools, threads and QoS

T T Read More

Why is tar so slow to create a tar.gzip archive on a fast Apple silicon Mac? Is it being run at low QoS on the E cores? An explanation.

September 10, 2025 Macs, Technology

Last Week on My Mac: Coming soon to your Mac’s neural engine

If Visual Look Up is so easy and low-power for Apple silicon Macs, maybe Tahoe’s new Foundation Models will prove more challenging, and wake up the neural engine.

September 7, 2025 Macs, Technology

How much power does Visual Look Up use?

Using powermetrics and log entries, a single image was processed on an M4 Pro, with content analysis and object recognition and look-up. How much power and energy did that use?

September 2, 2025 Macs, Technology

A brief history of the Secure Enclave

Originally the ‘security enclave’, and subject of a series of patents, it was introduced in the iPhone 5s in 2013, then the T2 in 2017, and blossomed in M-series Macs from 2020.

August 30, 2025 Macs, Technology

What happens during startup?

Explains the sequence of events from Boot ROM to FileVault login, what storage is accessible at different times, and where the code is.

August 29, 2025 Macs, Technology

What is a SEP panic?

The panic log tells you it was a SEP Panic. What’s the SEP, and how is this different from any other panic? And what should you do about it?

August 26, 2025 Macs, Technology

What to do when there’s something fundamentally wrong with an Apple silicon Mac

How to check there’s no hardware problem, then use Restore in DFU mode to completely wipe internal storage, including firmware, and reset the NVRAM.

August 22, 2025 Macs, Technology

How to check if your Apple silicon Mac is booting securely

How to check your Mac is booting in Full Security, and how to read its log to verify all the key steps involved in that process.

August 21, 2025 Macs, Technology

Is your Mac’s firmware up to date?

Gives the latest firmware versions for all Macs running the most recent supported version of macOS, and which are expected to change in the future.

August 6, 2025 Macs, Technology

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