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I was trying to start from an external disk. I was having trouble, so I used the Startup Security Utility and chose no security. Now, I can't change it to Full Security-- message says I have to download something?
MacBook Pro 13″, macOS 10.15
Nancy Blazis wrote:
I was trying to start from an external disk. I was having trouble, so I used the Startup Security Utility and chose no security. Now, I can't change it to Full Security-- message says I have to download something?
?
Thanks for trying, but this article didn't give me any way to solve the problem. I called Apple Support, and a representative was able to help me.
Restore full security to my MacBook Pro
