The Terminal will now display a list of all your drives and partitions.
Press the “Enter” key on your keyboard. Copy/paste the following into the Terminal:. 
Navigate to “Applications > Utilities” and then launch the Terminal app.
You can perform this check, using the Terminal application: The first step, is to verify that your Mac is definitely lacking a Recovery partition.
Use a USB flash drive or other secondary volume to create a bootable installer.Are your really missing a Recovery partition?. Use the App Store or a web browser to download and install an earlier macOS. Use the App Store to download and install the latest macOS. You can also use these methods to install macOS, if the macOS is compatible with your Mac: If the Mac logic board was just replaced, you might be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you might be offered only the macOS that came with your Mac, or the closest version still available. Otherwise you're offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you're offered the latest macOS that is compatible with your Mac. On an Intel-based Mac, if you use Shift-Option-Command-R during startup, you're offered the macOS that came with your Mac, or the closest version still available. When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions: When the new owner starts up the Mac, they can use their own information to complete setup. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.Īfter installation is complete, your Mac might restart to a setup assistant. Allow installation to complete without putting your Mac to sleep or closing its lid. If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD. If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first. If the installer asks to unlock your disk, enter the password you use to log in to your Mac. 
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.įollow these guidelines during installation:
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