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.This was on the 2016 MacBook Pro, and your.
When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions: When you install a smaller update like macOS High Sierra 10.13.5, expect the installation to take about 20 minutes, but it could take over a half our. 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.The reason is pretty straight forward: by formatting your Mac drive you will eliminate all the issues accumulated over time and have a clean slate to start again.
A clean install of macOS High Sierra will ensure the maximum performance for 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: Why opt to clean install macOS High Sierra.
Reinstalling macOS does not remove data from your Mac.