The below explains why.Ī MacBook's power management works very simply: it maintains a balance of power between the power consumed by the loads and the power available from the sources. It will operate safely, but the CPU performance will be diminshed.
The MacBook it's plugged into won't operate in a "brownout". It will clearly run at full capacity for longer than a higher wattage adapter or even fail to keep up with the energy demands of a machine using more than 60w giving you a flat battery if you run a deficit of energy “while charging”. So no, a 60W adapter won't overheat when connected to a machine that needs an 85W adapter. This is a given for the systems to receive safety certifications.
I will give some facts along with my reasoning.Īll MagSafe adapters, when plugged into a mechanically matching receptacle on a MacBook/MacBook Pro, are designed to run safely.
There is a lot of misinformation in some answers.
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