Apple releases firmware fix for heat-related throttling issue with newest MacBook Pros

Anyone have an idea of what they mean by this? It sounds most like someone saying that there was an issue with an ACPI thermal zone’s definitions(I’m assuming ‘key’ as in ‘key/value’) that caused less elegant than desired state transitions; but that’s basically pure speculation.

(edit: an intriguing theory has surfaced to the effect that the problem is actually related to the CPU being set to try to draw substantially more power than the VRM can handle more than momentarily; then getting throttled down hard when the VRM overheats and tries to save itself. Allegedly these…optimistic…VRM draw values aren’t new; but a CPU that says “125 watts? Challenge Accepted.” has brought a formerly obscure setting to light.

If true this would be a bit of a downer. The VRM is too unassuming to get much attention; but unless you think that +12v is a totally OK Vcore for contemporary CPUs it’s a component you want to keep happy.)

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