Install macOS on Multiple M1 Macs in 12 Minutes with AC2! [DEEP DIVE] Apple Silicon Big Sur Restore!

This is a Deep Dive Tutorial on how to restore (macOS Big Sur) firmware on multiple M1 Apple Silicon Macs at the same time. I will show you how the process works, where the files are stored, how many Macs can be connected, what equipment is needed, how ipsw file is unpacked, NVRAM Settings, how to monitor the install and more! This process is just like restoring multiple iPhones and iPads with iOS. I will show you how to boot your Apple Silicon M1 Mac to DFU Mode so you can Restore macOS with a full Big Sur IPSW file in under 12 minutes to multiple Macs in this advanced step-by-step tutorial!!!

Table of Content

0:00 Opening and Introduction
0:55 Why use AC2 to restore? (ease and speed of reinstall)
1:10 The 2 other ways to reinstall macOS (Recovery and USB)
2:40 In some cases it's the ONLY way to restore (Mac with exclamation point)
4:00 How to boot an M1 MacBook and Mac Mini to DFU mode
9:45 Different Cables + USB-A and USB-C Hubs
10:42 Getting started with AC2
11:12 Should you download the IPSW file manually or let AC2 download it?
12:58 AC2 Options - Restore vs Revive
13:42 Starting the AC2 Restore & monitoring the restore
14:00 Where is the IPSW file unpacked and stored?
14:46 Using the AC2 Activity option to watch the restore process
16:00 Using Activity Monitor to watch disk transfer speed
16:55 Halfway through the restore process
17:09 You need enough space on the host to restore multiple Macs
18:24 IPSW & BridgeOS IPSW Downloaded file folder Location
19:23 Talking about M1 Factory Restore & NVRAM part 1
20:25 All 4 restores are compete after 11 minutes
20:50 An error at the end of restoration
22:18 Factory Restore & NVRAM Part 2 is not cleared (WiFi settings still retained!)
23:14 Remove/Clear NVRAM with nvram -c from recovery
23:26 A full erase of your HD and NVRAM - "Erase Mac Option"
24:09 Download site for full macOS IPSW files
24:52 A Internet Connection is required on the host Mac for ACS Restore
25:26 Signing of the IPSW file and what it means for restores
26:04 Ending and signoff

Using Apple Configurator 2 to restore macOS to multiple Macs is perfect for
Schools
Businesses
Technology Resellers
Recyclers
Repair Shops

Main Article
https://mrmacintosh.com/restore-macos-firmware-on-an-apple-silicon-mac-boot-to-dfu-mode/

mrmacintosh.com/how-to-reinstall-macos-on-your-apple-silicon-mac-everything-you-need-to-know/

Order of that you should follow for reinstalling macOS on Apple Silicon.

1. macOS Recovery
2. System Recovery – (Will boot automatically if macOS Recovery is unavailable)
3. macOS Big Sur USB Installer Drive – (External boot for macOS Installers is enabled by default on Apple Silicon)
4. Apple Configurator 2 REVIVE option – This option will reinstall macOS Recovery (retains user data on the SSD hard drive)
5. Apple Configurator 2 RESTORE option – This option will Reinstall macOS Recovery, ERASE your SSD hard drive and reinstall macOS
Apple has just posted a new articles on macOS recovery, booting to DFU mode and how to restore macOS Firmware.

Revive or restore a Mac with Apple silicon with Apple Configurator 2
Apple Silicon M1 Mac Mini
Apple Silicon M1 MacBook Air
Apple Silicon M1 MacBook Pro 13"

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Supplies - (Support Mr. Macintosh with Amazon Affiliate Links) As an affiliate I earn a small commission from qualifying purchases made using the link

Anker USB C Hub Adapter 7-in-1 USB C Hub, with 4K USB C to HDMI, 60W Power Delivery
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Anker USB C Hub 5-in-1 USB C Adapter with 4K USB C to HDMI, Ethernet Port, 3 USB 3.0 Ports, for MacBook Pro
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Belkin USB-C to USB-A for older Macs
https://amzn.to/3iBlcu0

AmazonBasics USB Type-C to USB-A 2.0 Male Charger Cable, 6 Feet
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6.6ft (2m) Thunderbolt 3 Cable - Thunderbolt 3 to Thunderbolt 3 Cord, for Thunderbolt 3 (USB C) Hub, Adapter, Devices, 20V/5A
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Links
https://MrMacintosh.com - Apple Mac Enterprise IT Blog & macOS News

Twitter
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Mac Transition to Apple Silicon Everything you need to know!
https://mrmacintosh.com/mac-transition-to-apple-silicon-everything-you-need-to-know-updated/

New Article How to reinstall macOS on your Apple Silicon Mac
mrmacintosh.com/how-to-reinstall-macos-on-your-apple-silicon-mac-everything-you-need-to-know/

macOS ISPW Firmware Database - Download Full macOS ISPW Files!
https://mrmacintosh.com/apple-silicon-m1-full-macos-restore-ipsw-firmware-files-database/

MacOS Big Sur Index of need to know changes! (UPDATED)
https://mrmacintosh.com/macos-big-sur-11-index-of-need-to-know-changes-links-updated/

macOS System Status (Issues) – OS, Xprotect & App Version Database
https://mrmacintosh.com/macos-system-status-version-info-for-macadmins/

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