13-Inch 2013 MacBook Air Gets Up to 15 Hours of Battery Life With Mavericks

In his lengthy and ultra-detailed review of Mavericks, John Siracusa of Ars Technica conducts battery benchmark tests to measure Mavericks' power saving features on both a 2007 MacBook Pro and a 2013 13.3-inch MacBook Air.

While both systems saw notable battery gains going from Mountain Lion to Mavericks, the 2013 MacBook Air in particular saw impressive improvements of up to 30 percent, lasting for more than 15 hours in some instances.

batterylifetestsmavericks
For his battery tests, which were conducted using OS X 10.8.5 and the GM build of Mavericks, Siracusa created a light Web browsing and text-editing automation script, including websites that used Flash. In his tests, battery life varied significantly, but provided, on average, an increase of two hours of work time.

I suspect the aggressiveness of the auto-playing Flash ads that happen to be on specific websites on a particular day may partly explain the huge variability in Mountain Lion's numbers. Some of the lower-scoring Mountain Lion trials may have also had the bad luck to coincide with energy-intensive periodic jobs—jobs that are prevented from running on Mavericks due to AC power or battery-level restrictions as part of centralized task scheduling.

These tests may or may not be representative of how you use your Mac, but regardless, it's clear that Apple's efforts have not been in vain. Mavericks really does consume less energy than Mountain Lion when performing the same tasks.

Since its debut at WWDC, Apple has touted the power saving features bundled into Mavericks, poising improved battery life as the keystone of the operating system. Mavericks is designed to cut down on CPU activity using Timer Coalescing, Compressed Memory, and App Nap.

While Timer Coalescing bundles low-level operations into a single batch action that reduces CPU utilization by up to 72 percent, App Nap cuts down on the power usage of apps that are not running in the foreground, reducing their overall power draw by up to 23 percent. Compressed Memory also works in conjunction with these two features, compacting the least used processes so less time is spent reading and writing virtual memory swap files on disk, which improves power consumption.

There's also a new power saving feature built directly into Safari, called Power Saver. With Power Saver, Safari intelligently detects plug-in content playing in the margins of a website and pauses it, preserving battery life.

During Apple's October 22 event, Apple's senior vice president of Software Engineering Craig Federighi also highlighted Mavericks' battery saving capabilities on the new 13-inch MacBook Air, noting that the operating system provides an extra hour of web browsing and an hour and a half of extra video time.

Mavericks is available for free from the Mac App Store and is a one-step update for all Mac users running OS X Snow Leopard and above. It can be installed on most computers produced after 2007. As of this morning, total Mavericks adoption hovered at approximately seven percent.

Related Roundup: MacBook Air
Related Forums: MacBook Air, OS X Mavericks

Top Rated Comments

Klae17 Avatar
104 months ago
This is where Apple kills the competition.
Score: 46 Votes (Like | Disagree)
ctross Avatar
104 months ago
My 2007 Macbook Pro battery lasted about 10 minutes on Mountain Lion. Just upgraded to Mavericks, hoping to get a whole half an hour!
Score: 44 Votes (Like | Disagree)
tbrand7 Avatar
104 months ago
Wow!
Score: 37 Votes (Like | Disagree)
madsci954 Avatar
104 months ago
Can't innovate anymore my ass!
Score: 32 Votes (Like | Disagree)
jamesryanbell Avatar
104 months ago
Very nice! 15 hours for a MBA is insanity. Wow.
Score: 13 Votes (Like | Disagree)
atsang Avatar
104 months ago
You'll be lucky! in my Real World test (that is actually using the damn thing not just setting up some script) I've never had more than 8 hours from my June 2013 13" Macbook Air. In consequence I expect I'll be extremely lucky if I get more than 9 hours with Mavericks (and yes I've already upgraded and in two hours of use (web surfing mainly but one or two other very minor tasks like setting up iBooks) the battery life is down to 72%.

So it looks like far from battery life improving, it's got worse. At least this time yesterday i was only down to 75%

sounds like a pretty scientific test you got there.
Score: 11 Votes (Like | Disagree)

Top Stories

studio buds family

Beats Studio Buds Debuting Today With Active Noise Cancellation, Stemless Design, and More for $150

Monday June 14, 2021 8:00 am PDT by
We've seen a lot of teasers about the Beats Studio Buds over the past month since they first showed up in Apple's beta software updates, and today they're finally official. The Beats Studio Buds are available to order today in red, white, and black ahead of a June 24 ship date, and they're priced at $149.99. The Studio Buds are the first Beats-branded earbuds to truly compete with AirPods...
affinity designer contour tool

Serif Updates Affinity Photo, Designer, and Publisher With New Tools and Functions

Thursday February 4, 2021 1:58 am PST by
Serif today announced across-the-board updates for its popular suite of Affinity creative apps, including Affinity Photo, Affinity Designer, and the Apple award-winning Affinity Publisher for Mac, all of which were among the first professional creative suites to be optimized for Apple's new M1 chip. "After another year which saw record numbers of people switching to Affinity, it's exciting to...
maxresdefault

Craig Federighi and Greg Joswiak Discuss iPadOS 15, macOS Monterey, Privacy, Shortcuts on Mac, and More

Saturday June 12, 2021 6:12 am PDT by
As is tradition, Apple executives Craig Federighi and Greg Joswiak joined Daring Fireball's John Gruber in an episode of The Talk Show to discuss several announcements that Apple made over this weeks WWDC, including iPadOS 15, macOS Monterey, and a large focus around privacy. Federighi kicks off the conversation discussing the common architecture, now thanks to Apple silicon, across all of...
M1X MBP Feature

Leaker: Upcoming MacBook Pro to See Price Hike Over Current Model, Equal Performance Across 14 and 16-Inch Sizes

Tuesday August 24, 2021 5:28 am PDT by
The upcoming 14-inch MacBook Pro is set to be more expensive than the current 13-inch MacBook Pro and both the 14 and 16-inch models will offer the same performance, according to the leaker known as "Dylandkt." The leaker shared the information on Twitter, explaining that both of the upcoming MacBook Pro models, expected to come in 14 and 16-inch sizes, will feature the same performance due...
youtube apple tv

YouTube Discontinuing 3rd-Generation Apple TV App, AirPlay Still Available

Wednesday February 3, 2021 3:09 pm PST by
YouTube is planning to stop supporting its YouTube app on the third-generation Apple TV models, where YouTube has long been available as a channel option. A 9to5Mac reader received a message about the upcoming app discontinuation, which is set to take place in March.Starting early March, the YouTube app will no longer be available on Apple TV (3rd generation). You can still watch YouTube on...
General Apps Messages

Android iMessage Competitor Puts Pressure on Apple

Friday July 30, 2021 3:15 am PDT by
Google and the three major U.S. carriers, including Verizon, AT&T, and T-Mobile, will all support a new communications protocol on Android smartphones starting in 2022, a move that puts pressure on Apple to adopt a new cross-platform messaging standard and may present a challenge to iMessage. Verizon recently announced that it is planning to adopt Messages by Google as its default messaging...
YouTube Picture in Picture Feature

YouTube Premium Subscribers Can Now Use iOS Picture-in-Picture: Here's How

Wednesday August 25, 2021 3:55 am PDT by
Google has rolled out picture-in-picture support as an "experimental" feature for YouTube premium subscribers, allowing them to watch video in a small window when the app is closed. If you're a premium YouTube subscriber looking to try out picture-in-picture, follow these steps: Launch a web browser and sign into your YouTube account at YouTube.com. Navigate to www.youtube.com/new. Scroll...
iPhone 13 Dummy Thumbnail 2

Kuo: iPhone 13 to Feature LEO Satellite Communications to Make Calls and Texts Without Cellular Coverage

Sunday August 29, 2021 7:39 am PDT by
The iPhone 13 will feature low earth orbit (LEO) satellite communication connectivity to allow users to make calls and send messages in areas without 4G or 5G coverage, according to the reliable analyst Ming-Chi Kuo. In a note to investors, seen by MacRumors, Kuo explained that the iPhone 13 lineup will feature hardware that is able to connect to LEO satellites. If enabled with the relevant...
twitterqrcode

Twitter Introduces QR Codes for Sharing and Following Accounts

Wednesday November 16, 2016 4:13 pm PST by
Twitter today introduced Snapchat-style QR codes, which are designed to make it easier to find and follow friends on the social network. Each Twitter QR code is unique to an individual Twitter user, so when scanned, it'll bring up the person's account. To access your Twitter QR code, you'll need the official Twitter app for iOS. In the app, go to your profile, tap on the gear icon, and select...
macOS Monterey on MBP Feature

Apple Seeds Sixth Beta of macOS Monterey to Developers

Monday August 30, 2021 1:11 pm PDT by
Apple today seeded the sixth developer beta of macOS Monterey, the newest version of the macOS operating system. The sixth beta comes three weeks after Apple released the fifth macOS Monterey beta. Registered developers can download the beta through the Apple Developer Center and once the appropriate profile is installed, betas will be available through the Software Update mechanism in...