When I started a MacBook Pro laptop this morning, I found the date was set set to December 31, 2000, though it had the correct date the day before. I also received messages asking whether I wanted to allow configd and mDNSResonder to accept incoming network connections. I believe those messages appeared because the signing certificates for the two applications no longer appeared valid to the system because their signing dates were after the December 31, 2000 date the system was showing.
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