When the new owner starts up the Mac, they can use their own information to complete the setup process. In the Recovery app window, select Reinstall for your macOS release, click Continue, then follow the onscreen instructions. If you're selling, trading in or giving away your Mac, press Command-Q to quit the assistant without completing setup. Choose Apple menu > Shut Down, press and hold the power button until Loading startup options appears, select Options, click Continue, then follow the onscreen instructions. When the installation is complete, your Mac may restart to a setup assistant.

Your Mac may restart and show a progress bar several times, and the screen may be empty for minutes at a time.

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 can't see your disk, or it says that it can't install on your computer or volume, you may 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.

To start the installation process, select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.įollow these guidelines during installation: It will open the Startup Manager so you can start the clean install. To continue, restart your Mac while pressing the Option Key. Take your bootable USB and connect it to your Mac. Reinstalling macOS won't remove data from your Mac. Clean Install macOS High Sierra from USB Bootable Drive Great, you’ve got this far Now, it’s time to hit the install button and leverage all your completed steps.

Reinstall macos high sierra