How Do I Wipe My Mac And Reinstall High Sierra? Credit: Make sure your Mac is turned on. If there are no errors, type diskutil unmount force /dev/disk0s2 into the command prompt. After you enter your password, it will prompt you to unlock and mount the APFS drive.
Find the disk you’re looking for by typing diskutil into the diskutil list. The terminal is located in the recovery area. On the thumb drive, I installed High Serria, reboot the Mac, and boot the drive from. I had a problem with a locked disc while in recovery mode. To unlock your system, you will need to visit an Apple Store and present them with a copy of your sales receipt. Once the installation is complete, your Mac will reboot and you will be able to use it with the new macOS High Sierra operating system. If you have a backup of your data, you can select the option to restore from Time Machine. Once the download has finished, you can launch the installation file.Ĭlick the Continue button and follow the on-screen instructions to begin the installation.ĭuring the installation process, you will be asked if you want to migrate your data from another Mac.
The installation file will begin downloading to your Applications folder. In the search field in the top-right corner, type in “macOS High Sierra.”Ĭlick the Get button next to the macOS High Sierra icon. Open the App Store app, which is located in the Dock. Next, you need to download the macOS High Sierra installation file from the Mac App Store. Once the drive has been formatted, you can close the Disk Utility app. In the Scheme drop-down menu, select GUID Partition Map.Ĭlick the Erase button to format the drive. In the Format drop-down menu, select macOS Extended (Journaled). In the left sidebar, select the drive that you want to use for the bootable installer.Ĭlick the Erase button in the main window. Launch the Disk Utility app, which is located in the Utilities folder in the Applications folder. You can create a bootable installer on a USB flash drive or an external hard drive that has all of the necessary files to run the installation.įirst, you need to format your drive correctly so that it can be used as a bootable installer. If you need to reinstall macOS High Sierra, but don’t have a bootable installer to hand, don’t fret.
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