13-inch MacBook Air and Pro and Mac Mini with Apple M1 chip

Apple explains how to fix macOS reinstallation errors on computers with the M1 chip

Apple has shared a series of instructions to solve the macOS operating system reinstallation errors that users with computers that use the company’s M1 chip are suffering.

On November 10, Apple presented its new 13-inch MacBook Pro and Air laptops and the Mac Mini desktop, the first to make use of its own Apple Silicon processors with the M1 chip, which replaces Intel’s.

Shortly after its release, multiple users reported problems restoring and reinstalling macOS on their computers, displaying a message that said, “There was an error preparing to update. Could not customize software update. Try again”.

The problem appears to arise when users erase or restore their computers before upgrading to macOS Big Sur 11.0.1 and now the company has posted a series of instructions on its support page for users to correct the problem.

“If you erased your Mac with the Apple M1 chip before upgrading to macOS Big Sur 11.0.1, you may not be able to reinstall macOS from macOS Recovery,” Apple notes on its page.

Among other things, Apple suggests that users use a bootable installer with another Mac and a suitable external flash drive. For those who prefer another method, Apple also details a 17-step process using the terminal in macOS Recovery.

“Use any of these solutions to reinstall macOS. Afterwards, you should be able to use macOS recovery as expected when reinstalling macOS in the future,” the company says.

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