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MP 7,1 Prohibitory sign on Mac Pro 7.1 after security update

D

dominicperry

macrumors member
Jun 6, 2020
54
28
You need to reinstall the OS from scratch, and then install your applications from scratch. Just use TM to migrate documents, nothing else. If your machine is anything like mine, it will take 1-2 weeks to reinstall everything and get it working again. But, by doing it step by step, if the problem recurs, you'll know it was one of the applications you installed in the last day or two. And you might get away with reinstalling everything you need without it crashing at all.
 
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