Theory: If you have a failed/ing battery on your MacBook Pro the OS won’t tell you. Obviously the OS knows, there are tons of sensors in these batteries, but Apple doesn’t want to tell the user the battery is bad because it’s not supposed to be user serviceable. So instead it just lets the machine degrade and randomly crash to force the user to bring it in. Unless you are like me and take your laptop apart because you think the SSD is failing only to find a battery balloon.
@feld I'm with @spacerog on this. There are many stories of MacBooks with trackpad problems that have nothing to do with software or the trackpad and everything to do with the (bad) expanding battery underneath. The OS was not notifying people, if I recall.
Now let's switch to a world where you do rely on the OS to know the battery needs replacing. Is it telling us there is a problem because there is or because Apple would like some more $?
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