Just ran diagnostics on my M1 MBP 13 so see if everything is ok. Did this test while running on battery and got a PPP001. Never experienced this before. Redone diagnose plugged in with a thumbs up. Read on the web that other people experienced the same thing with their Macs while running diagnostics on battery. One wrote that Apple changed the software lately and that a PPP001 is ok when running unplugged. Any ideas if this is true? THX for your expertise.
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