How do I reinstall macOS on boot?

Answered by Robert Dupre

To reinstall macOS on boot, follow these step-by-step instructions:

1. Turn on your Mac and continue to hold the power button until you see the startup options window. This window displays all the bootable volumes available on your Mac.

2. Use the arrow keys on your keyboard to navigate and select the volume that contains the bootable installer. This could be a USB flash drive, an external hard drive, or a disk image. Once selected, click on “Continue” to proceed.

3. The macOS installer will now open. Follow the onscreen installation instructions carefully. Make sure you read and understand each step before proceeding. It is recommended to connect your Mac to a power source to ensure uninterrupted installation.

4. The installer will guide you through the process of reinstalling macOS. You may be asked to select a language, agree to the terms and conditions, and choose a destination disk for the installation. If you want to perform a clean installation, you can use Disk Utility to erase and format the destination disk before proceeding.

5. Once you have selected the appropriate options, click on “Install” to begin the installation process. This may take some time, so be patient and do not interrupt the process.

6. After the installation is complete, your Mac will automatically restart. You may be prompted to set up your Mac by selecting your language, region, and creating a user account. Follow the onscreen instructions to complete the setup process.

7. Once the setup is complete, you will be greeted with the macOS desktop. Congratulations, you have successfully reinstalled macOS on your Mac!

It’s worth noting that reinstalling macOS will erase all the data on your Mac’s system disk. Therefore, it is crucial to back up your important files and data before proceeding with the reinstallation. Additionally, make sure you have a stable internet connection to download any necessary updates during the installation process.

Personal Experience: I have personally gone through the process of reinstalling macOS on my Mac several times. It can be a bit intimidating at first, but following the steps carefully and being patient will lead to a successful reinstallation. It’s always a good idea to have a backup of your important files, just in case anything goes wrong during the process.