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#HOW TO DOWNGRADE MAC OS SIERRA WITHOUT LOSING ANY DATA INSTALL#
#HOW TO DOWNGRADE MAC OS SIERRA WITHOUT LOSING ANY DATA PASSWORD#

Use a USB flash drive or other secondary volume to create a bootable installer.

#HOW TO DOWNGRADE MAC OS SIERRA WITHOUT LOSING ANY DATA INSTALL#

Use the App Store to download and install the latest macOS or an earlier macOS.

You can also use these methods to install macOS, if the macOS 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.

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.External Hard Drive is not Visible Solution: If you are having any kind of issue related to your external drive, try one of the following. When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions: Select the drive losing data and then click 'Scan' to scan the drive After scanning, select the missing files and click on 'Recover' to find back data 5. 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.

#HOW TO DOWNGRADE MAC OS SIERRA WITHOUT LOSING ANY DATA PASSWORD#

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.