How to

In addition to the startup volume, which holds a bootable copy of the operating system along with your applications and data, your Mac's disk contains a hidden recovery partition that you can boot from in order to reinstall macOS, perform a quick check of connected disks, and more.

But what if the built-in recovery partition gets damaged, for instance? Enter Internet Recovery Mode (or macOS Recovery over the Internet), an Internet-based version of Recovery Mode found on Macs, which loads recovery tools from Apple's servers.

With Internet Recovery Mode, you can reinstall macOS and troubleshoot issues in the unfortunate scenario of your Mac's startup disk having become corrupted or completely unreadable.

In this tutorial, you'll learn everything about Internet Recovery Mode on Intel-based Macs and Macs with Apple silicon. You'll also see how to use it to your advantage if your disk encounters an issue or the startup drive has been replaced or erased.

Starting your Intel or Apple silicon Mac in Recovery Mode provides the tools you need to solve various problems. It is typically your last chance to repair the startup disk, reinstall macOS or restore from a backup after a fatal failure that prevents your Mac from starting up properly. In this tutorial, you'll learn how to enter Recovery Mode at boot time and use the built-in recovery tools to bring your Mac in perfect working condition.