Previous shutdown code 0: Power disconnected (power unplugged/battery issue) This may take a while as Mac skips info to find messages containing "Previous shutdown cause." When it finishes, note down the cause and check whether it fits one of these: You can replace the number 24 to trace back to when the shutdown happened.
Step 2: Paste this command to view the shutdown event messages within the last 24 hours: log show -predicate' eventMessage contains "Previous shutdown cause"' -last 24h Step 1: Open the Terminal app from Finder > Applications > Utilities. If you want to investigate more about the issue, you can view the crash reports in Mac Console or get the information from Terminal by following these steps: If your MacBook turns off when unplugged, it likely has a failed battery or charging issues. If your iMac keeps shutting down when it sleeps or on startup, sleep mode settings or battery connection is more likely to be the suspect. If your MacBook Pro shuts down randomly after updating macOS (e.g., Monterey or Big Sur 10.15.4), you know it's most likely a software glitch relevant to the current macOS.
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