Battery Life Improves Slightly with OS X Mountain Lion 10.8.1
Battery life on portable Macs running Mountain Lion improved slightly with the OS X 10.8.1 update, but still generally underperforms the same Macs running Lion. Since updating to OS X 10.8.1 from 10.8, we have conducted several unscientific tests on a variety of different Macs and found there is a minor improvement to battery life between the two versions of Mountain Lion, though most users probably wonāt notice a significant change.
The hardest hit Macs tend to be any portable model with a Core i5 and Core i7 CPU from 2011 and 2012, including the MacBook Pro and MacBook Air, while, interestingly, Core 2 Duo machines seem to be less impacted with battery performance remaining mostly the same in Mountain Lion as it was in Lion.
MacBook Air 13ā³ Core i7 (mid-2012)
- OS X 10.8.1 ā 4:36
- OS X 10.8 ā 4:33
MacBook Air 13ā³ Core i5 (mid-2012)
- OS X 10.8.1 ā 4:48
- OS X 10.8 ā 4:31
MacBook Air 11ā³ Core i5 (mid-2011)
- OS X 10.8.1 ā 3:26
- OS X 10.8 ā 3:32
MacBook Air 11ā³ Core 2 Duo (late-2010)
- OS X 10.8.1 ā 5:45
- OS X 10.8 ā 5:47
Not all Macs have been impacted negatively by Mountain Lion however, a MacBook Pro 2010 model reported no noticeable change in battery life regardless of the version of OS X running on it.