Strange Happenings on Macbook Pro

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Hi, I'm new to the mac-forums and hope someone will be able to answer my questions.

I was using my mac fine last night, left some browsers open for me to look at later, with the power plugged in.

In the morning, I opened up the macbook, but it was mysteriously shut off. The battery had not died, it had 50% power left when I turned it on. It took an abnormally longer time to startup. Not an awfully long time, but still longer than it should have.

When the desktop came on, my entire list of networks that have accumulated over the 2 years I've had this computer has gone missing. Not only that, I got a message that popped up saying that my date/time were wrong, set before Dec 31, 2008 and could mess things up.
Third, my computer was not charging no matter what outlet I put it in. I know they worked because I've used them multiple times in the past.

I fixed my date/time issue fast, I still cannot figure out how to get my list back, and I seem to have fixed the power/charger problem after repairing disk permissions, verifying disk (with nothing to repair) and running macjanitor.

I'm worried I won't get my network list back, some I don't remember passwords to. But more importantly, I'm confused as to what may have happened to my mac overnight. Does anyone have any idea what to do, or what happened? And what I may be able to do to help prevent this from happening again?
 

chscag

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Your Mac's Specs
2017 27" iMac, 10.5" iPad Pro, iPhone 8, iPhone 11, iPhone 12 Mini, Numerous iPods, Monterey
Which MacBook do you have? And what version of OS X are you running? It always helps us to help you if you give us the particulars about your Mac when asking a question in this or any forum.

It's difficult to say what happened. It could be a problem with your MagSafe Adapter or the machine itself. Perhaps a power glitch caused the MacBook to shut down and your battery did not take over. Keep an eye on it for any future power problems. You might want to download the free coconutBattery app to monitor the status and health of your battery.

As to your networks and passwords, that's what a Password manager is for. Invest in one and you won't have to worry about that happening again. Or use the old fashioned method of writing them down in a notebook.
 

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