How to Reinstall macOS Without Losing Data 2023 Free

By | May 26, 2023

How to Reinstall macOSĀ 

Reinstalling macOS is a practical step in troubleshooting that can help you resolve a variety of software issues and ensure that your Mac is operating at its peak speed. You may frequently get a fresh start and solve these issues by reinstalling macOS, regardless of whether you have frequent crashes, system slowdowns, or chronic errors. This guide includes detailed directions for reinstalling macOS.

How to Reinstall macOS Without Losing Data 2023 Free

Preparing for Reinstallation

Before reinstalling macOS, there are a few steps that must be taken. First and foremost, make sure you have a backup of your important data. All of the information on your Mac will be lost during the reinstallation because your disc will be deleted. If you have a backup of your data and documents, you may easily restore them once the reinstallation is complete. You should also check the system requirements for the version of macOS you wish to reinstall to make sure it is compatible with your Mac.

Creating a Bootable Installer

To reinstall macOS, you must create a bootable installer. From the Apple website or the App Store, first download the macOS installer. Insert a USB drive with enough storage space after the download is complete, then follow the instructions to utilise the macOS installer to create a bootable USB drive. This bootable USB disc will serve as the installation medium for your macOS reinstallation.

Reinstalling macOS

Now that you have a bootable installer, it’s time to begin the reinstallation process. Restart your Mac and then press the appropriate keys to enter recovery mode. Once in recovery mode, choose “Disc Utility” to wipe your disc. Before starting, choose the appropriate disc and format it with the macOS Extended (Journaled) file system. Disc Utility should be closed when the disc has been deleted, then select “Reinstall macOS” to begin the installation process. Adhere to the on-screen directions after accepting the terms and conditions, then watch for the installation to be finished.

Post-reinstallation Steps

After macOS has been successfully recovered, there are a few after-reinstallation steps to consider. To begin, restore your data from the previous backup you created. Using the migration aid or manually, transfer your files back to your Mac. It’s also essential to update your software and drivers to the most recent versions. This can improve the performance and stability of the system while ensuring compatibility with the most recent macOS release.

How to Reinstall Different Versions of macOS

Check System Compatibility

Make sure the precise version of macOS you wish to install is compatible with your Mac before moving on with the reinstallation. To confirm the compatibility requirements, visit the Apple Support website or refer to the documentation for macOS.

Backup Your Data

Your CD will be deleted when you reinstall macOS, therefore you must first back up all of your crucial data. Use Time Machine or another dependable backup tool to create a backup of your files, programmes, and settings. You can use this to restore your data after the reinstallation is complete.

Obtain the Installation Media

To reinstall a different version of macOS, you will need the installation CD for that particular version. There are numerous ways to obtain it:

  • App Store: If the version of macOS you wish to reinstall is available, you can download it there. Open the App Store, do a search for the desired macOS version, and then follow the on-screen instructions to download it.
  • If the macOS version you want is not available through the App Store, you can use the Internet Recovery feature. When your Mac restarts, keep holding down Command, Option, and R until you see the spinning globe or a request to connect to a Wi-Fi network.

Create a Bootable Installer

Once you have the installation media, create a bootable installer to make the reinstallation process simpler. Connect a USB drive with sufficient storage capacity to your Mac, then carry out the following steps:

  • Open the “Terminal” programme on your Mac.
  • Use the right command to make the installer bootable. To create a bootable installer for macOS Big Sur, for example, use the command:

Command Copy Code:

sudo /Applications/Install\ macOS\ Big\ --volume /Volumes/Untitled

Reinstall macOS

Following the creation of the bootable installer, you can now reinstall the desired version of macOS. Do the following:

  • Connect your Mac to the USB drive with the bootable installation.
  • Restart your Mac while holding down the Option (or Alt) key.
  • Select the bootable installer drive from the list of potential starting discs, then click Enter.
  • Follow the on-screen instructions to begin the installation process.
  • After selecting the DVD on which you wish to install macOS, select the desired version.
  • Clicking “Install” will start the installation; hold off until it is finished.

How to Reinstall macOS Without Losing Data 2023 Free

Restore Your Data

You can use your earlier backup to restore your data after the reinstallation is finished. Use Time Machine or your favourite backup tool to restore your data, programmes, and settings to your Mac.


Reinstalling different iterations of the operating system is a helpful workaround when you need to troubleshoot issues or return to a previous version of macOS. By following the directions in this article, you can reinstall the chosen macOS version and enjoy a fresh, improved Mac experience.


Q: Will reinstalling macOS remove all my files? A: Yes, reinstalling macOS involves erasing your disk, so it’s essential to back up your data before proceeding. Ensure you have a backup to restore your files afterward.

Q: Can I reinstall macOS without an internet connection? A: While some macOS versions are available for download from the App Store, the Internet Recovery feature allows you to reinstall the original macOS version that came with your Mac even without an internet connection.

Q: How can I check the system compatibility for different macOS versions? A: Visit the Apple Support website or consult the macOS documentation to verify the compatibility requirements for the specific macOS version you wish to reinstall.

Q: Is it possible to revert to an older version of macOS? A: Yes, by following the steps outlined in this guide, you can reinstall an older version of macOS and revert to it from a newer version.

Q: Can I reinstall macOS on a different partition or drive? A: Yes, during the reinstallation process, you can choose the specific disk or partition where you want to install macOS. Ensure you select the correct destination disk or partition to avoid unintended data loss.

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