
Use a USB flash drive or other secondary volume to create a bootable installer.How to Retrieve Deleted Files from MacBook Air: Have you accidentally deleted files from MacBook Air? Use reliable Mac recovery software to recover all your important files deleted from MacBook Air within a few mouse clicks.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've just erased your entire startup disk, you may only be offered the macOS that came with your Mac, or the closest version still available.If the Mac logic board has just been replaced, you may only be offered the latest macOS that is compatible with your Mac.Or you can use Option-Command-R during the startup process 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.


Your Mac might restart and show a progress bar several times, and the screen might 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 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 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: Reinstalling macOS won't remove data from your Mac.
