Mountain Lion Causing Battery Issues For Some Mac Users
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Mountain Lion Causing Battery Issues For Some Mac Users



Last week Apple released Mountain Lion on the Mac App Store to almost universal praise, but it looks like the update is causing some battery life issues for users.

According to Ars Technica, a number of users are taking to Apple’s support forums to talk about battery life issues in OS X 10.8. Some users claim the new version of OS X is giving them half the battery life they had in Lion. Not everyone is seeing half their average battery life gone, but many say their battery life diminished after the update.

We’ve seen our own anecdotal evidence of the battery life decrease. Olympic photographer Andrew Weber recently tweeted an image of his estimated battery life on a MacBook Air running Mountain Lion. The battery estimates claim only the MacBook Air will only last 2 hours and 37 minutes on a full charge, well below Apple’s claim of five hours for the 11-inch model and seven hours for the 13-inch model.

OS X Mountain Lion

The good news is it looks like Apple is actively looking into the problem. Apple contacted several people in the thread about their issues. The company asked the users to log the information from Activity Monitor and other system information. Apple will use the data to identify the issue and hopefully fix it.

In the mean time, some users have their own theories on what could cause the problem. Increased idling CPU usage, file permission errors, Spotlight indexing, and network access issues are among the theories. Despite the theories nobody has found a way to fix the issues for users yet, so we’ll have to rely on Apple.



  1. TPM50

    08/03/2012 at 1:46 pm

    Their holding it wrong.

  2. Teckmea

    08/03/2012 at 4:15 pm

    Well, its a cool looking OS, but there several issues identified, and those issues are not only limited to battery drainage or random log-outs problems only. But there are many article from analysts predicting that Mountain Lion OS X 10.8 has a high vulnerability to virus outbreaks and Trojans, and due to which many Mac Lovers are still feeling reluctant to upgrade their OS to Mountain Lion.

    But I think there are many options that they can consider. For example: They can use virtual desktop service. Its around $1/day i guess, and will not only help eliminating this virus threats, but will also provide many other facilities. With hosted desktop on your Mac-book, you can even use windows 7 and other Microsoft’s application without even rebooting your system.

    Here’s an interesting article explaining how you can use a virtual desktop on your Mac, and its benefits:

    I hope you will find it interesting and informative.

  3. Erno

    08/05/2012 at 11:14 am


    I’m using CPULed and one of the CPU cores are always red from the time I installed Mountain Lion. I tried to close all programs, the problem remains the same, while above the keyword my mac was warmen the before the update. I suppose sum thread are running all the time and consume all the energy from battery.

  4. Erno

    08/06/2012 at 4:26 am


    For me the problem solved. I have a SafeNet client on my mac, which not supports the new Mountain Lion. It’s a known issue, but I think it’s not known, that the SfntMonD runs one of the cores with 100%. I’ve killed the process and problem solved!
    So I suppose we should wait for an upgrade from Safenet (the current client can’t be run under Mountain Lion anyway…)


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