As noted by 9to5Mac, Apple has seeded build 12F13 of OS X beta 10.8.5 to developers, one week after releasing the first beta of 10.8.5.

build12f13
The update comes with no known issues and can be downloaded via Apple's Developer Page or through the software update tool in the Mac App Store.

Top Rated Comments

Menge Avatar
162 months ago
802.11ac is not officially supported in 10.8 to begin with. Supported in 10.9.

And the new MacBook Airs are being sold 10.9DP1, then? Because they do support 802.11ac...
Score: 7 Votes (Like | Disagree)
ghostface147 Avatar
162 months ago
Meanwhile over here in Mavericks DP2 land....things are going good.
Score: 5 Votes (Like | Disagree)
Menge Avatar
162 months ago
soundguyami does make a point Menge. Just because we have newer hardware doesn't mean the current OS X will support it. Just as how rMBP were being shipped with 10.7.x even though that edition of OS X was not fully optimized for the retina until Mountain Lion came out a few months later.

What I mean is this timeline:

10.8.4 (no 802.11ac yet) ---> Branch custom build for Airs with 802.11ac ---> merge 802.11ac into mainline for 10.8.5

Maintaining two custom versions of 10.8.5 (one for computers with 802.11ac and one without) makes no sense. It's more work for nothing. They had to have a custom build of 10.8 for the Airs for the launch, but believe me, at the first chance they get, they're gonna merge both branches. It makes sense that 10.8.5 is the merged build.
Score: 4 Votes (Like | Disagree)
MrNomNoms Avatar
162 months ago
No known issues, eh — If this update fixes the blue tinting I'm experiencing now and then when switching from Integrated to Discrete graphics on my 15" mid 2012 MacBook Pro, I'll be a happy little camper.

No issues? I guess this is not where Apple is going to address 802.11ac problems :rolleyes:

A part of me wants to die when I see the above posts; 'no issues' means 'no known regressions' - that is, new problems introduced by the update when compared against the previous release.
Score: 3 Votes (Like | Disagree)
litmag01 Avatar
162 months ago
No known issues, eh — If this update fixes the blue tinting I'm experiencing now and then when switching from Integrated to Discrete graphics on my 15" mid 2012 MacBook Pro, I'll be a happy little camper.

It is a feature, not necessarily a benefit.:)
Score: 1 Votes (Like | Disagree)
soundguyami Avatar
162 months ago
No issues? I guess this is not where Apple is going to address 802.11ac problems :rolleyes:

802.11ac is not officially supported in 10.8 to begin with. Supported in 10.9.
Score: 1 Votes (Like | Disagree)

Popular Stories

m1 chip slide

Five Years of Apple Silicon: M1 to M5 Performance Comparison

Monday November 10, 2025 1:08 pm PST by
Today marks the fifth anniversary of the Apple silicon chip that replaced Intel chips in Apple's Mac lineup. The first Apple silicon chip, the M1, was unveiled on November 10, 2020. The M1 debuted in the MacBook Air, Mac mini, and 13-inch MacBook Pro. The M1 chip was impressive when it launched, featuring the "world's fastest CPU core" and industry-leading performance per watt, and it's only ...
All Screen iPhone 2027 Feature 1

Apple to Hide Selfie Camera Under Display of 20th Anniversary iPhone

Monday November 10, 2025 1:55 am PST by
Apple will conceal the front-facing camera under the screen of its 2027 iPhone, a Chinese leaker said today, corroborating reports that Apple's 20th anniversary iPhone will have no visible cutouts in the display. Weibo-based account Digital Chat Station said Apple's development of under-screen camera technology was progressing as planned for adoption in 2027, one year after it will...
Early Black Friday Deals 1

The Best Early Black Friday Apple Deals on AirPods, Apple Watch, iPad, and More

Saturday November 8, 2025 6:16 am PST by
We're officially in the month of Black Friday, which will take place on Friday, November 28 in 2025. As always, this will be the best time of the year to shop for great deals, including popular Apple products like AirPods, iPad, Apple Watch, and more. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When ...
iphone air thinness

iPhone Air Sales Are So Bad That Apple's Delaying the Next-Generation Version

Monday November 10, 2025 11:41 am PST by
The thin, light iPhone Air sold so poorly that Apple has decided to delay the launch of the next-generation iPhone Air that was scheduled to come out alongside the iPhone 18 Pro, reports The Information. Apple initially planned to release a new iPhone Air in fall 2026, but now that's not going to happen. Since the iPhone Air launched in September, there have been reports of poor sales...
2024 iPhone Boxes Feature

Apple Adjusts Trade-In Values for iPhones, iPads, Macs, and More

Thursday November 6, 2025 11:12 am PST by
Apple today updated its trade-in values for select iPhone, iPad, Mac, and Apple Watch models. Trade-ins can be completed on Apple's website, or at an Apple Store. The charts below provide an overview of Apple's current and previous trade-in values in the U.S., according to its website. Maximum values for most devices either decreased or saw no change, but the iPad Air received a slight bump. ...
Apple fitness plus feature

Future of Apple Fitness+ 'Under Review'

Sunday November 9, 2025 5:30 am PST by
The future of Apple Fitness+ is "under review" amid a reorganization of the service, according to Bloomberg's Mark Gurman. In the latest edition of his "Power On" newsletter, Gurman said that Apple Fitness+ remains one of the company's "weakest digital offerings." The service apparently suffers from high churn and little revenue. Nevertheless, Fitness+ has a small, loyal fanbase that...
iphone pocket%402x

Apple Debuts iPhone Pocket, a Limited Edition iPod Sock-Style Accessory

Tuesday November 11, 2025 1:23 am PST by
Apple has teamed up with Japanese fashion house ISSEY MIYAKE to launch iPhone Pocket, a 3D-knitted limited edition accessory designed to carry an iPhone, AirPods, and other everyday items. The accessory is like a stretchy pocket, not unlike an iPod Sock, but elongated to form a strap made of a ribbed, elastic textile that fully encloses an iPhone yet allows you to glimpse the display...
Liquid Glass General Feature

Apple Shares Liquid Glass Design Gallery

Thursday November 6, 2025 2:45 pm PST by
Apple is promoting the new Liquid Glass design in iOS 26, showing off the ways that third-party developers are embracing the aesthetic in their apps. On its developer website, Apple is featuring a visual gallery that demonstrates how "teams of all sizes" are creating Liquid Glass experiences. The gallery features examples of Liquid Glass in apps for iPhone, iPad, Apple Watch, and Mac. Apple...
iOS 26

iOS 26.1 Available Now With These 8 New Features

Monday November 3, 2025 5:54 am PST by
Following more than a month of beta testing, Apple released iOS 26.1 on Monday, November 3. The update includes a handful of new features and changes, including the ability to adjust the look of Liquid Glass and more. Below, we outline iOS 26.1's key new features. Liquid Glass Toggle iOS 26.1 lets you choose your preferred look for Liquid Glass. In the Settings app, under Display...
iPhone Satellite Feature

Apple Developing These 5 New Satellite Features for iPhone

Sunday November 9, 2025 6:07 am PST by
Apple is working on a series of new satellite connectivity features for the iPhone, Bloomberg's Mark Gurman reports. In this week's "Power On" newsletter, Gurman revealed that the new features in development include: Apple Maps via satellite: Navigation in Apple Maps without cellular or Wi-Fi connectivity. Photos in Messages via satellite: Support for sending photos in the Messages...