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I've got a MacBook with a Core 2 Duo CPU. I've got CoreDuoTemp installed which can show the current speed of the CPU. It appears to always show:
Mini : 1.0 GHz Maxi : 2.0 GHz Current : 2.0 GHz
I believe my laptop would run longer on battery if it were to run at a maximum of 1 GHz. Is there a way to configure this, or is the CPU speed adjustment completely automatic?
2Thanks a lot splattne! I've tried the suggested "PM command" and it successfully worked! Immediately extended battery lifetime from 2:31h to 5:48h!!! – None – 2012-07-22T07:50:47.243
Thanks, this appears to be the most specific answer. I tried
pmset
but it didn't seem to change the observed behaviour. – Greg Hewgill – 2009-07-19T21:49:28.583