So here we are – if you're charging your MacBook Pro, and particularly if you have accessories plugged in, use the ports on the right.
CHARGE MACBOOK PRO THUNDERBOLT PORT 1080P
And there are others in the same StackExchange thread sharing their own experiences with the problem and the fix. Mini Display Port to DVI VGA HDMI 1080P Thunderbolt Adapter for MacBook Pro/Air. Again moving power back to the right side, restoring State B, resolves the problem immediately.Īmazingly, this is actually a thing that happens. Moving power back to the left side, restoring State A, quickly restores the temperatures and kernel_task again comes back after 3-4 minutes.
The left side temperature drops and the kernel_task goes away within about 15 seconds.
State B cures the kernel_task problem by moving power from the left ports to the right. About 3-4 minutes later the dreaded kernel_task high CPU usage starts. You can see the Thunderbolt Left Proximity temperature sensor rise quickly. State A a USB-C hub (a mouse and keyboard, plus power) and a USB-C HDMI 2.0 adapter, both on the left side. It's game over at that point with fans spinning up and CPU usage skyrocketing.
So warm that the Thunderbolt Left Proximity sensor sees the increase in temperature and the kernal_task process appears. When you're charging using the left-hand ports and have other accessories plugged into the same side, things get a bit too warm. I'm not going to get into all the nitty-gritty of what's going on – you can read Adam's post for that – but the tl dr is pretty simple. But I know you're asking the obvious question – what's this got to do with charging? It's a good question and one that was answered emphatically in the same thread.
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