Apple Provides Instructions to Fix macOS Reinstallation Errors on M1 Macs

Sunday November 22, 2020 3:30 pm PST by Arnold Kim

Shortly after the launch of Apple's new M1 Macs, we saw reports that attempts to restore and reinstall macOS on those machines right away could result in an installation error that would leave your Mac non-functional.

macos big sur m1 macs restore issue
Specifically, the error message would read: "An error occurred preparing the update. Failed to personalize the software update. Please try again."

Over the weekend, Apple posted detailed instructions for users experiencing this issue. Specifically it seems the issue arises if you erase/restore your Mac before upgrading to macOS Big Sur 11.0.1.

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. A message might say “An error occurred while preparing the update. Failed to personalize the software update. Please try again.”

Use either of these solutions to reinstall macOS. You should then be able to use macOS Recovery as expected when reinstalling macOS in the future.

Apple suggests that you could create a bootable installer using another Mac. Otherwise, Apple details a more technical 17 step process using Terminal to restore your ‌M1‌ Mac to a functional state.

If you are still having trouble, Apple recommends contacting support, and you can also visit our ongoing forum thread where users are troubleshooting this specific issue.

Tag: Apple Silicon Guide

Popular Stories

Skyrim Comes to Apple Silicon Macs With New Unofficial Installer

Tuesday October 20, 2026 7:56 pm PDT by Hartley Charlton

Bethesda's beloved role-playing game "The Elder Scrolls V: Skyrim" has reached multiple generations of consoles since its 2011 debut, but it never officially came to the Mac. A new unofficial project called SkyrimMT now aims to make playing and modding it on Apple silicon Macs easier than ever. Mac owners have found ways to play Skyrim over the years, including installing Windows through...

• 32 comments

Here's What Apple's Apps Look Like on the iPhone Duo

Tuesday October 20, 2026 11:12 am PDT by Juli Clover

With just three days to go until the iPhone Duo is released, Apple is getting ready for the launch. Behind the scenes, the App Store now has screenshots of Apple's built-in apps running on the Duo. We've seen some apps in marketing materials, but images of the ones we haven't seen give us an idea of what it will be like using the iPhone Duo day to day. Many apps are shown in landscape...

• 116 comments

Apple Pulls Keynote, Pages and Numbers From App Store [Update: Back]

Thursday October 22, 2026 11:01 am PDT by Juli Clover

Apple has temporarily removed Keynote, Pages, and Numbers from the App Store, just after releasing an update that added iPhone Duo support and a new Intelligent Assistant. It is not clear if the apps were removed intentionally, or if it is a bug. Apple has not said when the apps will be reinstated, but if it was in error, they should return soon. Update: The Mac versions are back without...

• 68 comments

Top Rated Comments

sniffies

77 months ago

Clearly Apple is experiencing a Big Sur’ge of issues with their new Macs

Score: 35 Votes (Like | Disagree)

arn

77 months ago

Apple does write out the instructions in great detail, so it is easier than a "17 step process" would indicate.

True, though I don't think we see a "copy these terminal commands" instruction from Apple very often.

Score: 19 Votes (Like | Disagree)

grjj

77 months ago

What a mess this company has turned into

What mess?
There was a bug in 11.0. Apple issued 11.0.1 but some people received the machine and immediately did a restore for any of various reasons. Since the machines shipped after 11.0.1 they had the bug in 11.0.

The fix is fairly simple for anyone that would have encountered the bug, ie: generic home users are not in the habit of doing a complete system restore out of the box, power users do that.

Score: 18 Votes (Like | Disagree)