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

Apple Now Inviting Media to October 28 'Launch Experience'

Thursday October 15, 2026 4:13 am PDT by Hartley Charlton

Apple has begun inviting selected members of the media to a product launch experience in Los Angeles on Wednesday, October 28, according to Bloomberg's Mark Gurman. In a post on X, Gurman described the gathering as an "all-day product launch experience" for touchscreen MacBooks, a new iPad mini, and Macs equipped with M6 chips. Gurman previously reported that Apple would introduce the...

• 89 comments

Oops, Apple's Website Just Hinted at iPad Mini 8

Thursday October 15, 2026 5:27 pm PDT by Juli Clover

Apple has an unreleased iPad mini Smart Folio listed on its French regulatory website, hinting that a new iPad mini is coming. The case's A3632 model number doesn't match current or past iPad mini cases. Apple appears to have added the case to its website recently, and it's listed alongside iPhone 18 Pro accessories added in September. The listing doesn't include any iPad mini specs, but...

• 47 comments

Verizon Will Charge $10 a Month for iPhone Handoff

Friday October 16, 2026 4:37 pm PDT by Juli Clover

Verizon plans to charge customers $10 per month for the iPhone Handoff feature that Apple added in iOS 27. iPhone Handoff allows one phone number to be shared across two separate iPhones. Pricing was included in Verizon's iPhone Duo announcement today, with the carrier confirming iPhone Handoff will work with the iPhone Duo and the iPhone 18 Pro models. Verizon will support iPhone Handoff,...

• 108 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)