MacOS (Big Sur) Internet installation fails near the end

big surinstallmac-minimacos

Buying used mac mini 2018 I decided to do a clean system install to be sure that it is clean.
I followed the steps from the Apple docs: https://support.apple.com/en-us/HT201065

  1. signed out of everything
  2. reset NVRAM
  3. erased disk

then I followed the reinstallation procedure:
https://support.apple.com/en-us/HT204904
Command-R failed with some 2008F error or something so after some reading and thinking I used Option-Command-R which should install the latest OS available and compatible and that installs Bug Sur.

First it says I will have to wait for some 40 min for the process to finish and everything seems to go fine, but then around 11 mins before the end some problems start and the installation is cancelled with a human error saying: An error occurred installing macOS. You can try again to complete the installation.

Of course I've tried not once not twice, always ends with the same message and in a similar way when checking the logs. And talking about logs I managed to copy them so if anyone can read something useful from them and recommend any action that could solve the issue – here they are:
https://gist.github.com/piotrku/ae887b38ffcb25fad6810d3a7e4c5465

I'm using an Ethernet connection and the Internet connection is quite good (I event connected directly to the modem to bypass the router to be sure that no built in firewall causes the failure) and I tried on different hours for the past 3 days. I also read many pages describing similar problems but didn't found any real solutions.

Installing Bur Sur from USB fails (I think the same way as when installing from internet but fails). Installing Catalina from USB fails at the beginning with error 1008f. Doing Shift-Option-Command-R fails with some error like 1008f or 2008f at the globe stage beginning the process.

I don't know if there are any options left than sending it to Apple repair šŸ™

[edit]

Is this disk erased enough to creat new volume and proceed with the installation?
enter image description here

Best Answer

Below are the steps to install Big Sur from a flash drive when the Startup Security Utility disallows booting from external media.

  1. Use your Mac or another Mac to create the USB flash drive Big Sur installer. See the Apple website How to create a bootable installer for macOS.

  2. Boot to Big Sur Internet Recovery. In other words, start or restart the Mac mini and immediately hold down the Option+Command+R key combination until the spinning globe appears.

  3. When Recovery Assistant window appears, select one of the following options.

    • Choose an account and enter a password.

    • Choose Recovery Assistantā†’Erase Macā€¦ from the menu bar.

  4. Proceed until you reach the image shown below.

  5. If necessary, use the Disk Utility to erase the internal drive. When finished quit the Disk Utility.

  6. Select Utilitiesā†’Terminal from the menu bar. This will open a Terminal application window.

  7. If you have not already done so, plug in the USB flash drive Big Sur installer.

  8. Enter the command below to launch the Install macOS Big Sur application from the USB flash drive.

    "/Volumes/Install macOS Big Sur/Install macOS Big Sur.app/Contents/MacOS/InstallAssistant_springboard"

  9. Install macOS Big Sur to an internal drive volume.

References
HT208198: Startup Security Utility
HT201372: Create a Bootable Installer
HT211983: Use of InstallAssistant_springboard

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