M1 Macs

A collation of articles about M1, M1 Pro and M1 Max Macs.

Introductory

What’s in an M1 chip, and what does it do differently?
Hurricane and Icestorm – AMP, power, and background tasks
Queue-jumping, hints and deep integration – inside M1 integration
What’s ugliest about M1 Macs and needs improvement
Is that a thunderstorm coming? macOS 11.6, 12, and Apple Silicon Macs
Would you regret an M1 iMac?
How big should the memory and SSD be in your next M1 Mac?
Essential reading for M1 Mac users
Introducing your new M1 Mac
Next phase of the Apple Silicon transition
So Santa brought you an M1 Mac: here’s what you should know
What could go wrong with apps on Big Sur and Apple Silicon?
How abysmal SMB performance can choke networked backups
Looking for the killer app
Feeling fast, the psychology of computer performance

macOS 12 Monterey

What’s really coming in Monterey and other macOS updates next week
M1 Pro, M1 Max, the notch and Monterey
Getting started with Shortcuts: 1 Basics
Marking time
Should you clean install Big Sur or Monterey?
Retaining access to Big Sur when upgrading your M1 Mac to Monterey
Explainer: Live Text

Updates

Inside macOS installer apps and disks
Squeezing a thimbleful of update into a ten-gallon can
Why are Big Sur updates so large?
Better beta-testing
Inside the Content Caching server: performance and troubleshooting
How to make macOS betas and upgrades safer
Why you can’t make a snapshot of Big Sur’s System volume to roll back
Apple has released Big Sur 11.4 update, and Security Updates for Catalina and Mojave
What has changed in Big Sur 11.4?
Apple has released Big Sur 11.3.1 update (updated)
Big Sur 11.3 bug tracker
Changing updating habits
When will macOS updates hurt less?
That macOS update has caused havoc. What do I do next?
Apple has released Big Sur 11.3 update
What has changed in macOS Big Sur 11.3?
Apple has released Big Sur 11.2.3
Users are losing out against Big Sur’s sealed System
Big Sur 11.2.2 still doesn’t fix bugs with M1 external bootable disks
Big Sur 11.2.1 update is broken
Big Sur, Software Update, Content Caching Server and M1 Macs
What’s changed in Big Sur 11.2?
How to get the best out of the App Store

Recovery and startup modes

Startup modes for M1 Macs
A Guide to Startup Modes for Intel and M1 Macs
How Monterey changes Apple Silicon Recovery
How to recover a Mac from a kernel panic
Making a good Recovery: So many tools
Making a good Recovery: Installing a different macOS in Recovery
Explainer: the Recovery Partition
Dual-booting macOS: Disk structure and Recovery
Rethinking recovery and re-installing macOS
Is there still something amiss in the M1 firmware? – problems after erasing the macOS container on the internal SSD, and solutions
In the recovery position
Launching Recovery on an M1 Mac: Booting and control in 11.4
1 True Recovery
M1 Macs have a third Recovery mode
M1 Macs have another hidden boot mode
Why your M1 may not have Fallback Recovery yet
More M1 mysteries: Boot Recovery Assistant
Updating external disks and 1 True Recovery on an M1 Mac
System management and NVRAM on M1 Macs
M1 Macs radically change boot and recovery
What happens when an M1 Mac starts up?
How fast is an M1 Target Disk?

Security and firmware

Owners and users: Primary and secondary systems on M1 Macs
The perils of M1 Ownership
Big Sur 11.4 brings LocalPolicy and recovery access to M1 Macs
M1 Secure Boot, morphine and self-destruction
How to roll your M1 Mac back to Big Sur 11.1
Which firmware should your Mac be using? (version 5) – for Big Sur
Why is my Mac’s Gatekeeper data so out of date?
SilentKnight 1.15 and LockRattler 4.30 do more on Big Sur and M1 Macs
Code-signing requirements for scripts and apps in Big Sur
Apple Silicon Macs will require signed code
Big Sur’s Signed System Volume: added security protection

External boot disks

Current:
How to create a bootable external disk in macOS 11 or 12
M1 Macs running Big Sur 11.4 support external disks fully
Booting an M1 Mac: external disks and local boot policy in macOS 11.4
Why cloning Big Sur isn’t as useful for an M1 Mac
Can you create an external bootable disk by cloning an M1 Mac?
Dealing with a kernel panic during M1 startup
Historical accounts:
How it took 6 months for M1 Macs to work properly
How to boot an M1 Mac into an older version of Big Sur
Booting an M1 Mac: external disks and local boot policy
External bootable disks work better with M1 Macs in Big Sur 11.3
Are external boot disks a thing of the past?
Updating external disks and 1 True Recovery on an M1 Mac
Big Sur 11.2.1 update is broken – more info about getting an external boot disk to work
External boot disks still don’t work properly with M1 Macs
Booting an M1 Mac from an external disk: it is possible
Is it not possible to boot an M1 Mac from an external disk?

Rosetta, Universal Apps

Running Intel code on your M1 Mac: Rosetta 2 and OAH
When you don’t have permission to run an app on an M1 Mac
How Rosetta complicates call chains on M1 Macs
Rosetta 2 won’t let the undead die
The non-Universal binary: a cautionary tale
Coming NeXT on Apple Silicon
Magic, lipo and testing for Universal binaries
How to tell Intel code from Universal
Tuning Apple Silicon will be complex at first

iOS and iPadOS Apps

How macOS launches an iOS app
iOS apps are translocated when run in macOS
How macOS manages iOS apps: RunningBoard comes of age

Disk maintenance and layout

Where’s my Data volume? Navigating boot volumes in macOS 10.15, 11 & 12
Checking disks on an M1 Mac
Big Sur boot volume layout
Why you shouldn’t delete one of a Volume Group in macOS 11 or later
Juggling with HFS+ and APFS partitions and volumes: a primer

SSD performance

Running custom storage benchmarks using Stibium
Back to measuring the performance of M1 Mac internal storage
It looks like the M1 SSD is faster than those in Intel Macs, but…
Internal SSDs can read files at extreme speed
How fast is the SSD inside an M1 Mac?

Extensions

Extensions are moving away from the kernel
Tackling extension problems in Big Sur
Extensions, Big Sur and M1 Macs

Logs

Big Sur 11.1: bug in log show command affecting Ulbow and Consolation
Inside M1 Macs: Time and logs

Time Machine

Why nothing else can back up to APFS like Time Machine does
Should you back up to APFS or HFS+?
Going beyond T2M2 with Mints: grokking Time Machine to APFS
Time Machine to APFS: Evolution
Time Machine to APFS: Understanding backups
Time Machine to APFS: Backing up
Time Machine to APFS: How processes have changed
Time Machine to APFS: Backup structure and access
Time Machine to APFS: Maintenance and repair
Time Machine to APFS: Changing disks
Time Machine to APFS: How efficient are backups?
Time Machine to APFS: First full backup
Getting started with Time Machine to APFS in Big Sur
Time Machine to APFS: Using a network share
Time Machine to APFS: When a network backup goes wrong
Improving the performance of Time Machine backups to network storage
T2M2 version 1.15 analyses APFS backups in Big Sur and is a Universal App
APFS changes in Big Sur: how Time Machine backs up to APFS, and more
MacSysAdmins presentation on Time Machine: slides

Time differences

Inside M1 Macs: Time and logs
Times forgotten
Mints now tells you the (Mach absolute) time
Changing the clock in Apple Silicon Macs

Design and performance

M1 Icestorm cores can still perform very well
Accelerating the M1 Mac: an introduction to SIMD
Explainer: macOS scheduled background activities
How to run commands and scripts on Efficiency cores
Are there flaws in some ARM64 instructions?
How M1 Macs feel faster than Intel models: it’s about QoS
Cores shouldn’t all be the same: M1 Macs do better
There’s more to the M1 than speed
How unified memory blows the SoCs off the M1 Macs
How Big Sur checks Universal Apps
Can you trust floating-point arithmetic on Apple Silicon?

Teething troubles

A tendency to panic
How to restore Spotlight search of Rich Text files
Upgrading to Big Sur 11.0.1: news from the surgery
Will Big Sur support the cloning of System volumes?

Assembly language programming

Code in Assembly for Apple Silicon with the AsmAttic app (1)
Code in ARM Assembly: 2 Registers explained
Code in ARM Assembly: 3 Working with pointers
Code in ARM Assembly: 4 Controlling flow
Code in ARM Assembly: 5 Conditional loops
Code in ARM Assembly: 6 Flow, pipelines and performance
Code in ARM Assembly: 7 Moving data around
Code in ARM Assembly: 8 Integer arithmetic
Code in ARM Assembly: 9 Bit operations
Code in ARM Assembly: 10 Conditions without branches
Code in ARM Assembly: 11 Floating point registers and conversions
Code in ARM Assembly: 12 Rounding and arithmetic
When idiomatic code is slower, and how to Accelerate
Where’s the accelerator? – documentation for SIMD and Accelerate
Code in ARM Assembly: 14 Lanes and loads in NEON