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User profile for user: sweendiggler
sweendiggler Author
User level: Level 1
18 points

Charging Issues Since Monterey Upgrade on M1 MacBook Pro

Hello Everyone,


I have a 2020 M1 MacBook Pro that I have been enjoying for several months now. On Monday I upgraded to MacOS Monterey 12.0.1 and have been experiencing issues with charging ever since.


When I plug in my charger (original Apple 61w w/ OEM Cable) the computer recognizes it and the device either runs off of wall power or charges for a time, no issue. But inexplicably as the device sits plugged in on my desk, the laptop eventually fails to recognize that it's getting power from the wall and starts draining the battery. I tried using an Apple 96w charger with another OEM cable in the office and the laptop is experiencing the same issue. This never occurred before the Monterey upgrade, and appears to occur regardless of which charger/cable combination that I use.


Has anyone else experienced this issue? I contacted Apple Support, and they had me run the laptop in safe mode for 10 minutes and then reboot, which didn't seem to make a difference. I really don't want to have to bring this into the Apple Store to get replaced under AppleCare+, because I think it's probably a firmware issue related to Monterey and not a hardware failure.


What should I do?

MacBook Pro (2020 and later)

Posted on Nov 3, 2021 4:35 AM

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User profile for user: PRP_53
PRP_53
User level: Level 10
91,795 points

Posted on Nov 3, 2021 4:41 AM

There are any USB-C Hub between the Charging cable and computer ? For best results a Direct connection from charger and cable to computer.


Batteries are considered Consumable Products. Over time it will degrade to a point where it needs to be replaced. The usage is normal as the capacity will go up and down all the time and never stay always at 100%. Apple Batteries are rated for 1000 Full Battery Cycles and / or 80% Capacity before needing Evaluation or replacement.


For additional reading on Battery and Apple Computers this link may help. About battery health management in Mac notebooks and especially for the M1 and Big Sur If battery charging is paused or on hold on your Mac


Depending on the Age of the computer, some aspects from the above links, may or may not apply to your computer.


A feature introduced into Big Sur was to preserve the number of Full Battery Cycles - there was an Algorithm coded into the macOS. It is perfectly Normal for Big Sur to Pause / Suspend charging the battery beyond 80% and hold it at that level. One can nudge / over-ride this by clicking the Battery Icon on Desktop Top Bar and allow charging beyond 80%. From observations, it will Pause / Suspend again once reading 90%. Same procedure to over-ride and will charge to 100%

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User profile for user: Dan Grassetti
Dan Grassetti
User level: Level 1
35 points

Apr 8, 2022 2:44 PM in response to PRP_53

this seems to be the case. If I connect to my external monitor via HDMI (via a hub) and run power directly from the Apple power supply to the other USB C socket on the computer it works as intended. If, however, I connect the monitor via USB C and either take power from the monitor or via the Apple power supply plugged into the hub it just charges to 100% all the time.


As best I can tell this feature only works if ONLY the Apple power supply is attached to the computer directly.


Kind of a bummer as this seems like a great feature, but basically doesn't work with USB C monitor connections. And USB C monitor connection is nice because one can use the monitor as a USB hub.

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Charging Issues Since Monterey Upgrade on M1 MacBook Pro

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