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Question: What does the no entry sign mean on my MacBook Pro

No entry sign

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It is the Prohibitory symbol and means your Mac couldn't find a valid system folder to start from. Reinstall Mac OS:

About the screens you see when your Mac starts up - Apple Support

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Mar 9, 2018 7:17 AM in response to Yoselinfromtx In response to Yoselinfromtx

It is the Prohibitory symbol and means your Mac couldn't find a valid system folder to start from. Reinstall Mac OS:

About the screens you see when your Mac starts up - Apple Support

Mar 9, 2018 7:17 AM

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Question: What does the no entry sign mean on my MacBook Pro