Apple has confirmed that some M1 Mac owners may run into an error message when attempting to reinstall macOS on their new machine. If you’re one of them, there are some things you can do to avoid it.
These include using a bootable installer, rather than macOS Recovery, or initiating a reinstall from Terminal. We’ll show you how.
“If you erased your Mac with Apple M1 chip before updating to macOS Big Sur 11.0.1, you might be unable to reinstall macOS from macOS Recovery,” Apple explains in a new support document.
Some users will see a message that reads: “An error occurred while preparing the update. Failed to personalize the software update. Please try again.” Here’s what to do if this happens.
Fix macOS reinstallation issues on M1 Macs
Use a bootable installer
If macOS Recovery won’t work as intended for you, Apple recommends using a bootable installer instead. You’ll need another Mac and a suitable external flash drive (or other storage device) to create one.
Read more at CultOfMac.com