Αρκετοί χρήστες παρατήρησαν ότι μετά την αναβάθμιση στο OS X Mountain Lion, η διάρκεια ζωής της μπαταρίας του MacBook τους μειώθηκε δραστικά.
Our own testing revealed similar (and significant) drops in battery runtime after installing Mountain Lion. In previous tests, we were able to regularly achieve just over 8 hours of use by relying solely on our Retina MacBook Pro’s integrated Intel HD4000 GPU. Performing the same “real-world” test using the same software applications and usage pattern, we never got the Retina MacBook Pro to run for more than a few minutes past 5 hours after a full charge.
Typically, the quad-core processor wasn’t taxed beyond 5 percent capacity, except for occasional 10-20 percent spikes when loading webpages, reading or writing files, or other activities. Unexpected file system or network access, or less efficient use of the GPU, could cause additional power drain without showing significant CPU use.
Σύμφωνα με χρήστη των Apple support forums που επικοινώνησε με την εταιρεία, το πρόβλημα αναμένεται να διορθωθεί με μελλοντικό update του λειτουργικού:
I can confirm this is definitely a software (OS) issue, as the guy that was dealing with me said that an update will be issued via the [Mac App Store] as soon as they can work a fix