What does a ‘Do Not Enter’ symbol mean during startup
After rebooting my iMac I get a ‘Do Not Enter‘ symbol showing up on the blank screen. What does that indicate?
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Chris of Arabia wrote:
After rebooting my iMac I get a ‘Do Not Enter‘ symbol showing up on the blank screen. What does that indicate?
According to: About the screens you see when your Mac starts up - Apple Support
"Prohibitory symbol
When you see a circle with a slash symbol instead of the Apple logo, it means your Mac couldn't find a valid System Folder to start up from.
If you're using your Mac at a school or business, it might be trying to start from the wrong version of macOS. Contact your IT department for more help.
If this is your personal Mac, try reinstalling macOS using macOS recovery."
