Last Tuesday, it was reported that anecdotal evidence of the new OS X 10.8 Mountain Lion causing battery life issues on some MacBooks users has emerged. Based on a test conducted by Ars Technica, Apple’s new operating system could be the reason why the batteries of some of their devices are draining significantly faster than its predecessor.
In a series of tests, the online publication tested the battery on two MacBook Pro with Retina Display. One of the notebooks runs on the new OS X 10.8, while the other one runs with Lion. Ars was able to hit more than eight hours of runtime with the Lion-powered MacBook Pro. On the other hand, the notebook that is powered by Mountain Lion only lasted for around five hours.
The test was conducted a couple of times, each using similar applications such as Safari, Chrome, Twitter, iChat, TextEdit, Photoshop, Mail and Outlook. Dropbox and gfxCardStatus also ran in the background. As for the device’s system settings, both MacBook Pros has an activated Wi-Fi, while its Bluetooth is turned off and its screen brightness was set to half-strength.
The Activity Monitor on Apple’s new OS was actively used to check the CPU usage. Although there are occasional increases in user-initiated operations such as reading or writing a file, the processor is usually under five percent capacity. This is in contrast to previous reports of heightened CPU temperature whenever the MacBook Pro is idle.
Apple’s Series of Unfortunate Events
A forum thread with regards to OS X 10.8 Mountain Lion’s battery issues was started on July 25, the same day when Apple released the new OS. The thread chronicles the number of complaints from users who recently installed the OS X 10.8.
In relation to this, a few forum members suggested that the problem lies with the OS’ Power Nap feature. On the other hand, some users have found limited success with resetting their machine’s system management controller, although a fool-proof fix is yet to be discovered.
What’s interesting about this is that only certain machines are affected with the battery life issue of Mountain Lion. In fact, there were reports that their MacBook Pros have an increased in battery life after installing the new OS.
While the Cupertino-based company is yet to release an official statement, there were claims that Apple representatives reached out to affected users to obtain system information in an attempt to find a remedy to the problem.
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