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Processeur quad-core Intel Core i7 à 2,0 GHz, 2,3 GHz ou 2,6 GHz (Turbo Boost jusqu'à 3,8 GHz) avec 6 Mo de cache L3 partagé.

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MacBook Pro Shuts Randomly Shuts Down

Looking for some assistance with a MacBook Pro randomly shutting down when running on battery. Just before shutting down, the fans ramp up to full speed.

Diagnostics showed the battery was faulty and was replaced.

Since the battery replacement, the frequency of shutdowns has reduced by approximately 80%. Diagnostics show there’s still a minor issue with the battery, despite being new.

No new software has been installed in the past 9-12 months, or major OS upgrades. System is running Catalina.

Not sure what other hardware to check from here, has anyone solved this issue before? Any assistance is appreciated.

Update (08/24/2021)

The OS says the battery is 100% charged, and coconutBattery is providing some conflicting information:

Block Image

After the OS showed 100% charge for the battery, the Full Charge Capacity bar in coconutBattery continued to slowly creep from the 96.3% shown in the screenshot to 100% over a timespan of approximately 45 minutes.

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Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Ajout d'images à une question existante


after further testing, the issue appears to be hardware related as opposed to software. I've tried different accounts, and have verified all software, no change in laptop behavior.

I've noticed when the laptop is attached to a Henge Dock, with the screen closed, the laptop never shuts down.

Also see the issue when the laptop is open, running on battery or power supply, it will shut down when a USB Ethernet adaptor is plugged in to the laptop. I've tried two different Apple brand adaptors, same result.

Any ideas on how to narrow down which piece of hardware is potentially causing the issue?


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The OS level is looking at things from a workable standpoint Vs a true level. Think of it this way is the glass half full of half empty ;-}

I trust CoconutBattery data.

I don't see any issues with your new battery I would watch things to see if things are messing up within the OS/App space. Are you getting kernel crashes? Review your logs.

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Dont see any crashes in the logs, actually there's nothing in the Crash Reports area of Console.


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Steve sera éternellement reconnaissant.
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