How To Reinstall MacOS Big Sur Without Data Loss (Keep Files)?

The following guide will explain how to reinstall macOS Big Sur onto your Apple computer if there are any issues with the operating system.

If you are one of those Windows users Who are tired of frequent Windows crashes and you are thinking of buying a macOS-powered PC, You are wrong, Apple macOS also has plenty of speed and performance issues.

It has even happened to me. I ditched my gaming Windows laptop for Apple macOS with that in mind. It will help me to increase my productivity.

I bought an iMac in 2019 and since then, I’ve been having many issues. There were two main issues with my iMac.

It was booting in a loop and would crash shortly when the desktop appeared, and the most annoying thing (that happened at the end) is that before crashing and restarting itself again, the iMac wouldn’t even get past the Apple logo.

It’s been incredibly unreliable and slow, and I tried nearly everything to fix both errors but nothing worked out for me.

The only option left was to reinstall macOS Big Sur to get my iMac back up and running. And fortunately, the reinstallation of macOS Big Sur managed to resolve errors.

Will Reinstallation Of macOS Big Sur Delete My Files/Data?

You must be thinking what will happen with my data or files stored in iMac? The good news is that all of your files will still be intact on the hard drive. As well as after the reinstall, You will have to make some (not all) of your settings.

However, you might have to adjust some desktop settings such as screensaver, backgrounds, and other things.

Important Things To Do Before Reinstall macOS Big Sur

In recovery mode, This process first downloads and then reinstalls macOS Big Sur. Downloading installation media requires reliable internet connectivity.

First of all, You need to make sure your device is connected to an Ethernet wired connection or Wi-Fi.

I would highly recommend using an Ethernet wired connection to be on the safe side as sometimes Wi-Fi does not work.

The next very important thing is, Make sure that your machine is plugged into power and there is no chance of interruption during all the procedures.

Your keyboard and mouse must be wired. Bluetooth or wireless keyboard and mouse may not work in recovery mode.

How To Start Mac in Recovery Mode?

To go into recovery mode, you need to start up or restart your iMac computer and be vigilant. As it’s starting, Hold down the command and the R keys at the same time.

iMac will now boot into recovery mode. You may need to select your user profile and enter your password in order to log in.

How To Use Mac Recovery Mode To Reinstall macOS Big Sur?

You will now see the macOS utility window, where four options will appear.

1) Restore From Time Machine Backup

This option will make things a lot easier for you If you are good at taking backups and you had previously set up a time machine backup drive.

Restore From Time Machine Backup option can be used to restore your macOS-powered PC to an earlier date and make it usable again.

2) Reinstall macOS Big Sur

This option is presented to reinstall macOS. This is where we want to be but first let me explain the rest of the 2 options, I will get back to the main topic in a second.

3) Safari

The purpose of the third option is to get help online using the Safari web browser. This option may not help non-techie Mac users. But this is a very useful option If you are good at understanding how things work.

Safari options lead you to Apple’s official website or community forum. Where you can speak with Apple technicians or go through How-To-Fix tutorials.

4) Disk Utility

The fourth option is called disk utility. Running first aid on all your hard drives can help you resolve the issues you’re having.

How To Reinstall macOS To Refresh iMac Or Macbook?

I tried the first option and it didn’t work as I did not have the time machine backup, But it does not mean they are of no use.

These options can be handy to repair hard drives, run first aid, and delete drives from this recovery option If you need it.

Let’s reinstall macOS to refresh your macOS-powered computer.

Select “Reinstall macOS and then click continue follow the on-screen instructions.

Please agree with the terms and conditions.

You now need to choose the disk of your choice, you wish to install macOS Big Sur on.

After choosing the disk, If you have locked it with a password, You will be asked to log into the hard disk.

Type the password to unlock your Mac PC and then Big Sur will start downloading installation media from the official website of Apple and then reinstalling itself.

How Much Time Does It Take To Reinstall macOS Big Sur Via Recovery Mode?

Well! All this depends on your internet speed. This could take a few hours or a few minutes.

Until then, sit back, relax, and be patient hoping that everything will turn out how you want

Keep Two Things From Happening During All The Procedure

Do not turn off your Mac PC or close the lid during the installation.

Otherwise, all your efforts will go in vain. It restarts multiple times during the installation. Don’t interrupt, Just let it do its thing.

Your Mac device will prompt you to log in when it’s finished.

Congratulations, You have a fresh OS with no errors and you can now get back to work.

The rest of the process is conventional. All you need to do is follow the prompts on the screen to navigate the setup process.

What Did I Learn?

Backing up your files beforehand is always a good idea just in case something goes wrong

Your Turn

So this was what I did to make my iMac error-free and run like a new PC. Hopefully, you have successfully reinstalled macOS Big Sur by following my instructions.

Contact me via the comment section If you need any help. I will try my best to help you.