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startup

Which SSDs can you boot your M1 Mac from? Do hard disks work too?

Which of the external disks tested can be used to boot from? Do they work reliably with Secure Boot? Could you boot from an external hard disk?

April 29, 2022 Macs, Technology

A guided tour of M1 Recovery

How to use an M1 Mac’s Recovery system to boot in Safe mode, boot from another disk, and use its other important features. With a map.

February 11, 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

T T Read More

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

T T Read More

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

How M1 Macs can run old firmware when Intel Macs can’t

There’s a fundamental difference in the way that Intel and M1 Macs store and load their ‘firmware’, which enables the M1 Mac to load and run difference versions of iBoot.

December 30, 2021 Macs, Technology

How Secure Boot works on M1 series Macs

This article has now been extensively corrected and modified.

December 29, 2021 Macs, Technology

Who started that Mac up? How Macs can start up on their own

Odd things can lead to some Macs starting up or waking up spontaneously. Here’s one solution to those mysteries.

October 21, 2021 Macs, Technology

How to run an app or tool at startup

Four popular and straightforward ways to set your Mac to run an app or other software when it starts up. Includes AppleScript code.

September 16, 2021 Macs, Technology

Mints 1.5 reports recent boots and solves normalization

T T Read More

Now lists the time of the start of all boots in the last 24 hours, and helps you with Unicode normalization problems.

May 24, 2021 Macs, Technology, Updates

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