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

iphone 16 apple intelligence

Apple Aiming to Release 'Breakthrough' New iPhone Accessory

Wednesday February 18, 2026 12:43 pm PST by
Apple is looking for a "breakthrough" with its push into wearable AI devices, including an "AirTag-sized pendant," according to Bloomberg's Mark Gurman. In a report this week, he said the pendant is reminiscent of the failed Humane AI Pin, but it would be an iPhone accessory rather than a standalone product. The pendant would feature an "always-on" camera and a microphone for Siri voice...
Apple Watch 15 Tips Every Owner Needs to Know Feature

Apple Watch: 15 Tips Every Owner Needs to Know

Thursday February 19, 2026 7:38 am PST by
Apple Watch is now eleven generations in, and packed with useful features that are easy to miss at first glance. To help you get more out of your new device, we've rounded up 15 practical tips you might not have discovered yet, including a few that long-time users often overlook. Bounce Between Two Apps On your Apple Watch, double-press the Digital Crown to see a deck of all currently...
Dynamic Island iPhone 18 Pro Feature

10 Reasons to Wait for Apple's iPhone 18 Pro

Wednesday February 18, 2026 5:12 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...
iphone 17 pro green

iPhone 17 Pro Max Curiously Becomes Most Traded-In Smartphone

Wednesday February 18, 2026 9:13 am PST by
New trade-in data indicates that Apple's iPhone 17 Pro Max has rapidly become the single most traded-in smartphone. According to a new report from SellCell, Apple's latest flagship iPhone has quickly risen to the top of the independent trade-in market, accounting for 11.5% of all devices appearing in the top-20 trade-in rankings just months after release. The analysis is based on SellCell...
Multicolored Low Cost A18 Pro MacBook Feature

Low-Cost MacBook Expected on March 4 in These Colors

Wednesday February 18, 2026 5:42 am PST by
Apple will announce its rumored low-cost MacBook at its event on March 4, with the device coming in a selection of bold color options, according to a known leaker. Earlier this week, Apple announced a "special Apple Experience" for the media in New York, London, and Shanghai, taking place on March 4, 2026 at 9:00am ET. Posting on Weibo, the leaker known as "Instant Digital" said that the...

Top Rated Comments

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

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

Nobody will ever agree.
Score: 11 Votes (Like | Disagree)
176 months ago
Thank Goodness. Steve Jobs would have never... shut up*
Score: 11 Votes (Like | Disagree)
176 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)
176 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)