OS X 10.8.1 May Address Mountain Lion Battery Life Issues

Earlier this month, we pointed to testing by Ars Technica showing that upgrading to OS X Mountain Lion on a test Retina MacBook Pro substantially degraded its battery life. The testing showed a 38% decrease in battery life, moving from eight hours of battery life on a single charge under OS X Lion to just five hours under OS X Mountain Lion.

apple 7hr battery magsafe
Softpedia now reports that it has heard from one developer claiming that OS X 10.8.1, which entered developer testing just days after Ars Technica's report, does indeed address this battery life issue.

“Until I installed 10.8.1, my MacBook was showing 4h:05m after a full charge,” he said, referring to the amount of time before the battery would deplete completely.

“After installing 10.8.1 it's showing over 8h,” he said. “I'm now able to use my Mac throughout the day again without having to carry my charger,” said the happy developer.

Another report from Apple's discussion forums describes a similar major boost to battery life under OS X 10.8.1, but results from our own forums are less clear. Several users have reported no changes to their battery life while others suggest that there has been some improvement, but it appears that specific testing by those who were affected by the Mountain Lion battery life drop has not been well-documented.

OS X 10.8.1 will be the first maintenance release for OS X Mountain Lion, and such updates are generally pushed quickly through the development and testing processes in order to address the most severe bugs cropping up with the initial public releases of new operating systems. Significant battery life issues would seem to qualify as something Apple would want to address in this update, but the company has not specifically addressed the topic in release notes or other documentation associated with the test builds being distributed.

Popular Stories

iOS 26

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
iPhone 14 Pro Dynamic Island

iPhone 18 Pro Leak Adds New Evidence for Under-Display Face ID

Monday December 8, 2025 4:54 am PST by
Apple is actively testing under-screen Face ID for next year's iPhone 18 Pro models using a special "spliced micro-transparent glass" window built into the display, claims a Chinese leaker. According to "Smart Pikachu," a Weibo account that has previously shared accurate supply-chain details on Chinese Android hardware, Apple is testing the special glass as a way to let the TrueDepth...
iOS 26

Apple Seeds Second iOS 26.2 Release Candidate to Developers and Public Beta Testers

Monday December 8, 2025 10:18 am PST by
Apple today seeded the second release candidate version of iOS 26.2 to developers and public beta testers, with the software coming one week after Apple seeded the first RC. The release candidate represents the final version iOS 26.2 that will be provided to the public if no further bugs are found. Registered developers and public beta testers can download the betas from the Settings app on...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Monday December 1, 2025 2:40 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
Johny Srouji

Apple's Chipmaking Chief Johny Srouji Responds to Report About Him Potentially Leaving

Monday December 8, 2025 9:23 am PST by
Apple's chipmaking chief Johny Srouji has reportedly indicated that he plans to continue working for the company for the foreseeable future. "I love my team, and I love my job at Apple, and I don't plan on leaving anytime soon," said Srouji, in a memo obtained by Bloomberg's Mark Gurman. Here is Srouji's full memo, as shared by Bloomberg:I know you've been reading all kind of rumors and...
Johny Srouji

Apple Chip Chief Johny Srouji Could Be Next to Go as Exodus Continues

Sunday December 7, 2025 10:41 am PST by
Apple's senior vice president of hardware technologies Johny Srouji could be the next leading executive to leave the company amid an alarming exodus of leading employees, Bloomberg's Mark Gurman reports. Srouji apparently recently told CEO Tim Cook that he is "seriously considering leaving" in the near future. He intends to join another company if he departs. Srouji leads Apple's chip design ...
Foldable iPhone 2023 Feature 1

Apple to Make More Foldable iPhones Than Expected

Tuesday December 9, 2025 9:59 am PST by
Apple has ordered 22 million OLED panels from Samsung Display for the first foldable iPhone, signaling a significantly larger production target than the display industry had previously anticipated, ET News reports. In the now-seemingly deleted report, ET News claimed that Samsung plans to mass-produce 11 million inward-folding OLED displays for Apple next year, as well as 11 million...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
google pixel 10

Switching Between iPhone and Android Will Get Easier With New Apple and Google Collaboration

Monday December 8, 2025 11:10 am PST by
Apple and Google are teaming up to make it easier for users to switch between iPhone and Android smartphones, according to 9to5Google. There is a new Android Canary build available today that simplifies data transfer between two smartphones, and Apple is going to implement the functionality in an upcoming iOS 26 beta. Apple already has a Move to iOS app for transferring data from an Android...
Apple Fitness Plus expansion hero

Apple Fitness+ Coming to 28 New Regions With Digital Voice Dubbing

Monday December 8, 2025 6:19 am PST by
Apple today announced that Fitness+ is expanding to 28 new markets on December 15 in the service's largest international rollout since launch, accompanied by new language dubbing and a K-Pop music genre. Apple Fitness+ will become available in Chile, Hong Kong, India, the Netherlands, Singapore, Taiwan, and additional regions on December 15, with Japan scheduled to follow early next year....

Top Rated Comments

attila Avatar
174 months ago
Menu.battery.text = battery_level * 2; // was battery_level

FIXED!
Score: 23 Votes (Like | Disagree)
SvK Avatar
174 months ago
pretty sloppy Apple.
Score: 14 Votes (Like | Disagree)
Krazy Bill Avatar
174 months ago
Discussions of "Battery Life" belong in the religion or politics forums.

Nobody will ever agree.
Score: 11 Votes (Like | Disagree)
squirekyle Avatar
174 months ago
Thank Goodness. Steve Jobs would have never... shut up*
Score: 11 Votes (Like | Disagree)
Vctr Avatar
174 months ago
I wonder if the reported battery life increase is measured from real word use or if these developers are just going off the estimated battery life.

From the Ars Technica quote, it looks like they are going off of the estimate, which we all know is wildly inaccurate half of the time.
Score: 9 Votes (Like | Disagree)
macscancrash Avatar
174 months ago
Not everyone lives where there is a Starbucks, or where there is highspeed internet...or a coffee shop every damn corner. Stop being a snob.

McDonalds.

Snob that.
Score: 6 Votes (Like | Disagree)