Tests run on various portable Macs following the release of OS X 10.8.1 this week have yielded disappointing results regarding the much-expected improvements in battery life for MacBook owners.
Although some developers have been able to confirm a significant battery life spike
in their testing of Apple’s first point-release update to Mountain Lion, real-life tests tell a completely different story.
The most affected Macs seems to be any portable model with a Core i5 and Core i7 processor from 2011 and 2012, according to OS X Daily
After carrying out admittedly-unscientific tests on several such machines, the site concluded that Core 2 Duo computers seemed to be the least impacted. Their battery mileage remained “mostly the same in Mountain Lion as it was in Lion,” according to the report.
A lowdown of the reported tests shows that OS X 10.8.1 did close to nothing to improve the battery life on the respective MacBook Air models.
MacBook Air 13″ Core i7 (mid-2012)
OS X 10.8.1 – 4:36
OS X 10.8 – 4:33
MacBook Air 13″ Core i5 (mid-2012)
OS X 10.8.1 – 4:48
OS X 10.8 – 4:31
MacBook Air 11″ Core i5 (mid-2011)
OS X 10.8.1 – 3:26
OS X 10.8 – 3:32
MacBook Air 11″ Core 2 Duo (late-2010)
OS X 10.8.1 – 5:45
OS X 10.8 – 5:47
Considering that the tests are unscientific and that a single extra process running in the background can eat up anything between ten minutes to an hour of battery life, OS X 10.8.1 seems to bring no change whatsoever to the power management department.
In fact, the tests also showed that MacBook Air 2012 models are the most affected. The site’s 8+ hours achieved in testing with OS X Lion a few months ago have been cut in half.
Granted, any Li-Ion battery will hold a slightly smaller charge after months of heavy usage, but such a dramatic change is clearly abnormal.
It may be worth pointing out that Apple said nothing about including a battery drainage patch in OS X 10.8.1. They’re probably still working on it and, hopefully, it will be resolved in OS X 10.8.2 (currently in beta testing