If the installer offers you two choices: installing on Macintosh HD or Macintosh HD - Data, choose the former one.The installer doesn't see your disk or can't install it on your computer, erase your disk with Disk Utility first.The installer asks to unlock your disk, enter your Mac login password.If you do, please follow the below guides. During the re-installation, you might see some pop-up messages. Follow the on-screen guide to finishing the reinstalling process. After booting into the Recovery Mode, choose Reinstall macOS (your OS version name), and click Continue.

Make sure you have a backup of your Mac before applying this method. But if your Mac is badly damaged and needs to be erased, you will lose all the existing data on your computer. Generally, reinstalling macOS won't cause data loss on your Mac. Here in this part, you will see the detailed steps of reinstalling macOS. Click Options > Continue to open up Recovery. A message stating you'll be able to access startup options soon will appear. Choose from the Recovery Mode utility options. Press the Command and R keys at the same time until you see an Apple logo or spinning globe appear. The methods for entering recovery mode on these two types of computers are also different, which will be introduced separately here.

There are two types of Mac computers, one is using the Intel chip, and the other is using the M1 chip. In this case, you can try to enter Mac Internet Recovery Mode. At times, you may have a problem entering Recovery Mode. In the following parts, we will tell you how to boot into Mac Recovery Mode and reinstall macOS. Therefore, reinstalling macOS is also the ultimate method that users should apply when they use Recovery Mode to self-trouble shooting. In this mode, users can perform some operations on the Mac system, such as restoring the system backup files from Time Machine, reinstalling macOS, getting online help, and repairing/erasing disk with Disk Utility, etc.Īmong these recovery options, reinstalling macOS and erasing the disk should be applied with caution, because once the system is reinstalled or the hard disk is erased, all data on it cannot be recovered. Generally speaking, macOS Recovery refers to the Recovery Mode in the macOS. After booting into the recovery mode, choose.

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