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Model A1502 / 2.6 GHz (Turbo Boost up to 3.1 GHz) or 2.8 GHz (Turbo Boost up to 3.3 GHz) dual-core Intel Core i7 processor with 4MB shared L3 cache.

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MacBook locked up black screen with circle with slash

Logged on to my MacBook as usual. Put in password. Would not load then screen went black. Then white circle with a slash through it appeared. I tried logging in as “guest” but will not load Safari or any other page. I am connected to internet. When this happened, we were in a hotel and I put in hotel password, hit enter. My Kasperski window popped up and said “unsecured server”. To shut down and try again. Did that and that he is when I got the black screen trying to get back on after restart.

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For some reason, your system folder is corrupted! As you can see here: About the screens you see when your Mac starts up. You're seeing the Prohibitory symbol, this hapens when the system can't locate a valid system.

Try restarting and go into MacOs Recovery (Command-R ) About macOS Recovery

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Connie Hester will be eternally grateful.
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