-
All replies
-
Helpful answers
-
Oct 22, 2016 10:29 PM in response to Nwokafor Amobiby Stuart423,That means it cannot find a startup disk. Time to reinstall macOS on the computer.
Turn the computer off. Restart, and hold down the COMMAND + OPTION + R keys. When macOS Utilities appears, choose the second option: reinstall macOS.
Take a look: About the screens you see when your Mac starts up - Apple Support