Use a USB flash drive or other secondary volume to create a bootable installer. Now click on Reinstall macOS or Reinstall macOS and Continue.
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. Here you go, now you know how to reinstall Mac OS X, speed up your Mac with CleanMyMac X, do proper backups with Get Backup Pro, and even recover lost files with Disk Drill.If the Mac logic board was just replaced, you might be offered only the latest macOS that is compatible with your Mac.Or you can use Option-Command-R during startup to be offered either the latest macOS that is compatible with your Mac, or in some cases the macOS that came with your Mac or the closest version still available. On an Intel-based Mac, you can use Shift-Option-Command-R during startup to be offered the macOS that came with your Mac, or the closest version still available.Just click on the ' Continue ' button to proceed. A confirmation message will appear, informing you about the reinstallation details. Afterward, you simply need to follow this basic drill to reinstall macOS on your system. When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions: When you get the macOS utility window on the screen, you can just click on the ' Reinstall macOS ' option to proceed. 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. After the download is complete, your Mac will prompt you to do a restart, but at this point, you should completely shut it down. Now the OS should start downloading automatically onto the external drive. Allow installation to complete without putting your Mac to sleep or closing its lid. Within OS X Utilities, choose Reinstall OS X.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.
To begin installation, select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.įollow these guidelines during installation: Reinstalling macOS does not remove data from your Mac.