Marco Arment makes the case for Apple to add Low Power Mode to macOS which would disable Turbo Boost, limit CPU voltage, turn off the discrete GPU on relevant models, and make a number of other adjustments. He ran several tests to show what these changes could do to extend battery life and the results are compelling.

I’ve wanted Low Power Mode on the iPad from the day it launched on iPhone, but the iPad’s battery life is already quite good whereas the Mac would benefit greatly from the feature. I rarely use my MacBook Air, but if Apple was only going to bring it to one platform, I’d rather see it on the Mac.