How to reinstall macOS on a Mac without losing any data

If your Mac is not performing as expected, or is showing signs of slowing down, you could reinstall macOS to improve things. There could be several other reasons why you may want to reinstall macOS on your Mac. However, some people don’t do it worrying that they will lose all their, files, documents, or data in the reinstall process.

In this article, we will show you how to reinstall macOS on a Mac without losing any data.

Also see: How to find out when macOS was last reinstalled on your Mac

Reinstall macOS without losing data

When you reinstall macOS from Recovery, you will not lose any data if you don’t erase your main drive. A reinstall will only touch the system files and settings, while keeping all your data safe.

1) Restart your Mac into Recovery mode by pressing the Command + R keys while it restarts.

2) You should see a macOS Utilities window with several options.

3) Click on the Reinstall macOS option to start the process.

4) Press Continue to start the reinstall.

5) Select the main drive on your Mac when asked where you want to reinstall macOS.

The utility will now start to reinstall macOS on your Mac, and will not erase any files or data on your drive. As mentioned in the beginning, it’ll only replace the system files and settings. The process can take some time and your Mac will restart a couple of times before booting into the login screen. You can also choose to restore data from a Time Machine backup.

Wrapping up

As you can see, it’s fairly simple to reinstall macOS without losing any files, data, or documents. However, we do recommend taking a backup using an external drive and using the Time Machine backup feature. This way, if anything goes wrong during the reinstall process, you will still have all your data. The reinstall process requires you to be connected to the internet at all times, so make sure you have a stable connection at home.