Apple Seeds OS X 10.8.5 Build 12F26 to Developers - MacRumors
Skip to Content

Apple Seeds OS X 10.8.5 Build 12F26 to Developers

by

mountainlionApple today seeded build 12F26 of OS X 10.8.5 to developers, marking the sixth beta iteration of 10.8.5. The release comes exactly one week after the previous OS X 10.8.5 beta, build 12F23.

As with previous betas, the update contains no known issues and can be downloaded via Apple's Developer page or through the software update tool of the Mac App Store. It is also available to AppleSeed members with a new version of Safari.

Apple's OS X 10.8.5 beta is being tested along side the next version of the operating system, OS X Mavericks. Apple has thus far seeded four developer previews of Mavericks and plans to offer the new operating system to the public in the fall.

Top Rated Comments

167 months ago
I don't think anyone is downloading anything from the developer site :rolleyes:
Score: 8 Votes (Like | Disagree)
167 months ago
I'm a total noob in this area, but can someone explain me why they are still updating ML when they're releasing Mavericks in Oct/Nov? :confused:
Why not...? ML is the CURRENT OS, Mavericks is the OS to be launched. It's not there yet. So ML needs to be maintained. Simple as that.
Score: 6 Votes (Like | Disagree)
Antoni Nygaard Avatar
167 months ago
It can be downloaded via the Software Update if you have the developer seed configuration utility
Score: 6 Votes (Like | Disagree)
167 months ago
Then there is the whole "Testing a new OS" side of IT.

You wait for 10.x.2, test, and deploy. Unless it's Lion. Then you ignore it.
Score: 5 Votes (Like | Disagree)
AppleMacFinder Avatar
167 months ago
How do you know this, MacRumors? The developer site is down and you can't login.

Am I the only one confused by this?

[conspiracy] MacRumors admins are secret Apple agents! :eek: [/conspiracy]
Score: 4 Votes (Like | Disagree)
167 months ago
How do you know this, MacRumors? The developer site is down and you can't login.

Am I the only one confused by this?
Score: 4 Votes (Like | Disagree)

Popular Stories

Apple Event Logo

Apple's Next Era Begins September 1

Thursday May 7, 2026 10:36 am PDT by
Apple recently announced that Tim Cook will be stepping down as CEO later this year, after 15 years of leading the company. Effective September 1, Apple's hardware engineering chief John Ternus will become the company's next CEO, while Cook will become executive chairman of Apple's board of directors. In his new role, Apple said Cook will assist with "certain aspects" of the company,...
Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro Launching in September With These 10 New Features

Saturday May 9, 2026 6:03 am PDT by
While the iPhone 18 Pro and iPhone 18 Pro Max are not launching until September, there are already plenty of rumors about the devices. It was initially reported that the iPhone 18 Pro models would have fully under-screen Face ID, with only a front camera visible in the top-left corner of the screen. However, the latest rumors indicate that only one Face ID component will be moved under the...
Apple Watch Series 10 Jet Black Touch ID

Apple Watch Series 12 and watchOS 27: What to Expect Later This Year

Friday May 8, 2026 2:07 pm PDT by
While not too much has been reported about the next Apple Watch models, there are a few rumors about potential design changes and watchOS 27 features. Apple Watch Series 12 and Apple Watch Ultra 4 models are expected to be released in September, and we have outlined some of the key rumored hardware and software changes below. A new Apple Watch SE is not expected this year, as that model was...