Talking about the new MacBook Pro with Touch Bar on the MacJury podcast last week brought up battery life and how initially the new machines suffered from a problem where the discrete graphics processor (GPU) was running when it shouldn’t. A system update fixed that problem, but sometimes an application might be forcing the GPU into use, even in the background.
For TidBITS this week, I wrote a short article explaining how to determine which applications are using significant energy, and how to tell whether the discrete GPU is in use instead of the power-saving integrated graphics. This advice applies to any Mac laptop with a secondary GPU, not just the Touch Bar models.
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