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kernel extension

All you need to know about Safe mode

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Invaluable tool for identifying and locating some problems, for troublesome updates, clearing caches and more.

December 19, 2022 Macs, Technology

Booting a Mac Studio from an external SSD, and what it doesn’t solve

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Creating the external bootable SSD, downgrading security and allowing kexts, then trying to install a kext on an external drive which must be ejected.

April 19, 2022 Macs, Technology

Last Week on My Mac: kextermination is coming

Looking forward to the time when third-party kexts are finally banished from macOS, and replaced by modern system extensions, and their siblings.

April 17, 2022 Macs, Technology

The kernel and extensions 2: Secure Boot

Big Sur and Monterey allow kernel extensions with limitations, particularly on M1 models. Full details, including how to control them.

April 14, 2022 Macs, Technology

The kernel and extensions 1: To Mojave

How the kernel relies on its extensions to make your Mac work, and has highest privilege for stability and security. How this must change for Apple Silicon.

April 13, 2022 Macs, Technology

What shouldn’t you use an M1 series Mac for?

For the great majority of Mac users, M1 series Macs are a big step forward. But some users want the impossible. What can’t M1 Macs do?

February 1, 2022 Macs, Technology

What does Safe Mode do to an M1 Mac?

According to macOS Help, safe mode stops some software from loading, and performs a check of the startup disk. Here’s a more detailed and accurate account of what it does.

January 17, 2022 Macs, Technology

Booting an M1 Mac from hardware to kexts: 3 XNU, the kernel

Once the kernel takes over from iBoot, there’s a lot of hardware to get running before the SSV can be properly validation, and kernel extensions loaded.

January 6, 2022 Macs, Technology

Booting an M1 Mac from hardware to kexts: 2 LLB and iBoot

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Sometimes known as iBoot1 and iBoot2, they start work with the LocalPolicy for the intended boot volume, validating its vital components.

January 5, 2022 Macs, Technology

Booting an M1 Mac from hardware to kexts: 1 Hardware

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Understanding each of the four stages in the Secure Booting of an M1 Mac. These are summarised in diagram available here.

January 4, 2022 Macs, Technology

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