Reinstall macOS Big Sur M1 iMac 3 DIFFERENT WAYS macOS Recovery USB Install Disk & IPSW AC2 DFU Mode

Do you need to erase and reinstall macOS on your new M1 Apple Silicon 24″ iMac? If so a few things have changed! This is a step-by-step guide that will show you all that you need to know to boot your iMac to macOS Recovery & reinstall macOS Big Sur! I will show you 3 different ways.
1. Use the internal macOS recovery = 1-2 Hours total reinstall time
2. Use Big Sur USB Installer Drive = 30-45 Min total reinstall time
3. Use iMac DFU mode + Apple Configurator 2 + 2nd Mac = 8 MIN!!!

0:00 Intro
0:40 How to boot to macOS Recovery & Reinstall macOS over the internet (1-3 Hours)
6:25 How to Reinstall macOS Big Sur with a USB Installer Drive = (30-45 Min)
12:00 How to Boot M1 iMac to DFU mode for AC2 IPSW macOS Reinstall
15:00 How to Reinstall macOS Big Sur with IPSW file & Apple Configurator 2 = (8 MIN!)
18:20 Closing

My Create a macOS Big Sur USB Installer disk video

My Download macOS Big Sur Full Installers Page

My Download M1 Apple Silicon Full Big Sur installer IPSW Files!

I will go over the following
How to boot to macOS recovery on your Apple Silicon M1 iMac
How to erase your hard drive on your Apple Silicon M1 iMac
How to reinstall macOS on your Apple Silicon M1 iMac with Recovery
How to reinstall macOS on your Apple Silicon M1 Mac with a USB Big Sur Installer hard drive or flash drive.
How to Boot your M1 iMac into DFU Mode
How to reinstall macOS with Apple Configurator 2 & a 2nd Mac in 8 MIN!!

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.

Use macOS Recovery on a Mac with Apple silicon
macOS Recovery is the built-in recovery system of your Mac.
You can use the apps in macOS Recovery on a Mac with Apple silicon to repair your internal disk, reinstall macOS, restore your files from a Time Machine backup, set the security policy for different disks, transfer files between two Mac computers, start up in safe mode and more.
Reinstalling macOS requires an internet connection. To connect to the internet, you can use a wireless or wired network connection. See Connect to the internet using Wi-Fi.
Note: if you’re trying to connect to a captive portal (for example, at a coffee shop, library or hotel) or an enterprise network, you might not be able to access the internet in macOS Recovery.

This video is is for the following Apple Silicon Macs
Apple Silicon M1 iMac
Apple Silicon M1 Mac Mini
Apple Silicon M1 MacBook Air
Apple Silicon M1 MacBook Pro 13″

Support Mr. Macintosh!

– Apple Mac Enterprise IT Blog & macOS News for MacAdmins


Mac Transition to Apple Silicon Everything you need to know!

New Article How to reinstall macOS on your Apple Silicon Mac

macOS ISPW Firmware Database – Download Full macOS ISPW Files!

Download macOS Big Sur Full Installers via InstallAssistant.pkg

macOS Updates Database! – OS, Xprotect & App Version Database

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Subscribe to “The Apple Ninja’s” YouTube! If it wasn’t for him, I would not even be on YouTube today. Thank you!!!


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  1. A few things are different with installing macOS Big Sur on the new 24" M1 iMac! I will go over all the things you will need to know + I will show you 3 ways to reinstall macOS Big Sur from the slowest 1. macOS Recovery (1-2 hours) 2. USB Big Sur install disk (30-45min) & Apple Configurator 2. DFU mode and a 2nd Mac with a Big Sur IPSW file (8 Minutes!!!) Let me know if you have any questions.

  2. I did factory reset my M1 MacBook Pro 13 but it’s taking forever to install the MacOS Big Sur .. A friend told me when my Mac goes to sleep mode it stops downloading .. I want to know if it true

  3. 100 times better than apple ccc guide provided

  4. So I need help. After I dragged the ipsw file to my macbook, it says that “the system can’t be restored on this device” and it gives [ – 0xBC6 (3014)]
    What should I do? The computer i’m trying to restore is M1 iMac which is why i tried the 11.3 and 11.6 which both gave me the same error message.

  5. please i need to contact with u , i stocks and i did many things wrong . now i can use it
    i need to send u some pics , please

  6. My new iMac wouldn't let me login when it woke, force turned it off, then it went into MacOS recovery after it turned on. don't know why, made me a little worried.. any ideas why?

  7. Can  configurator 2 work on the intel computers 2 to reinstall the macOS without using the internet recovery. ?

  8. Thanks for the video,Using the usb installer, I get this message "this copy of macos big sur is too old to be opened on ths verson of mac os" Kindly advise

  9. 🏆🎖 Subbed + thank you! Your vid is worth 🔥GOLD! 👩🏾‍🦳👏🏾

  10. Wish I saw this earlier! Bricked my M1 iMac and had to send it back… They're sending me a MacBook Pro as I chose it as an alternative… any advice? Some people have said to just make sure it's updated and it should be golden?

  11. I have an query if i have already downloaded the MacOS.pkg file from your website and now if it is no longer signed in by apple so then is it possible to install that MacOS.pkg file on our mac.Please reply

  12. Sir I by mistake clicked on mac power button for some time and I appeared with the loading setup options. Like u had shown .now how can I get back from this situation.
    Please help fast

  13. Dear Mr. Macintosh, How to use iPad pro as a main display for mac min m1? Thank you.

  14. thanks for making this video! very nice to have to refer back to! great video!

  15. Can you try to boot a M1 Mac to Windows 10 ARM using a USB stick? I haven't seen that anywhere yet.

  16. Added this excellent article to my collection. Love your work. Stay safe

  17. Always amazing videos. I used your video to install BigSur on my unsupported MBP. Thank you.

  18. I always turn my volume up when the video starts 😂.

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