Got a tip for us?Let us know

a. Send us an email
b. Anonymous form

Apple Releases OS X Mountain Lion Developer Preview 4

Monday June 11, 2012 6:34 PM PDT by Jordan Golson

Osxdp4
Apple released new versions of OS X Mountain Lion to developers today. Developer Preview 4 arrives with a build number of 12A239, while OS X Server Developer Preview 5 has build number 12S254j.

The release notes do not reveal any major updates to the software, but note a few minor issues with Setup Assistant, FileVault and QuickTime screen recording. Most significantly, the release does not ask developers to focus on any specific areas for testing, suggesting Mountain Lion will indeed be ready for release next month.

Mountain Lion was covered extensively at the WWDC Keynote this morning. It will be released in July on the Mac App Store for $19.99.

Top Rated Comments

RoelJuun

178 months ago

I just don't want Apple to rush Mountain Lion, fix all the bugs first and release it when it's ready. And write some great drivers for the older models too please, don't focus only on your newest creations.

Score: 6 Votes (Like | Disagree)

KALLT

178 months ago

Watching the keynote now... Uhh, where are the Dock indicators?

Theyre still there if you look closely.

Score: 3 Votes (Like | Disagree)

Yamcha

178 months ago

Just Installed Developer Preview 4 and It looks amazing, they've done an awesome job of making refinements on the UI..

Score: 2 Votes (Like | Disagree)

Cougarcat

178 months ago

isn't that in iOS not OS X?

Both versions got updates. OS X's received New Gesture-based tab navigation, unified bar, and cloud tabs.

Score: 2 Votes (Like | Disagree)

Cougarcat

178 months ago

no safari update?

Yes, Safari 6...

Score: 2 Votes (Like | Disagree)

GIZBUG

178 months ago

im assuming we will see a GM build next than the final? as for Facebook integration.. maybe 10.8.1?

FB is already integrated..............

http://www.cultofmac.com/173035/apple-releases-os-x-mountain-lion-developer-preview-4-with-facebook-integration/?utm_medium=twit&utm_campaign=spread-us

Score: 2 Votes (Like | Disagree)

Read All Comments

Popular Stories

Apple's CarPlay Ultra to Expand to These Vehicle Brands Later This Year

Sunday February 1, 2026 10:08 am PST by Joe Rossignol

Last year, Apple launched CarPlay Ultra, the long-awaited next-generation version of its CarPlay software system for vehicles. Nearly nine months later, CarPlay Ultra is still limited to Aston Martin's latest luxury vehicles, but that should change fairly soon. In May 2025, Apple said many other vehicle brands planned to offer CarPlay Ultra, including Hyundai, Kia, and Genesis. In his Powe...

• 90 comments

iOS 26.3 and iOS 26.4 Will Add These New Features to Your iPhone

Tuesday February 3, 2026 7:47 am PST by Joe Rossignol

We are still waiting for the iOS 26.3 Release Candidate to come out, so the first iOS 26.4 beta is likely still at least a week or two away. Following beta testing, iOS 26.4 will likely be released to the general public in March or April. Below, we have recapped known or rumored iOS 26.3 and iOS 26.4 features so far. iOS 26.3 iPhone to Android Transfer Tool iOS 26.3 makes it easier...

• 30 comments

Apple's Next Launch is 'Imminent'

Sunday February 1, 2026 12:31 pm PST by Joe Rossignol

The calendar has turned to February, and a new report indicates that Apple's next product launch is "imminent," in the form of new MacBook Pro models. "All signs point to an imminent launch of next-generation MacBook Pros that retain the current form factor but deliver faster chips," Bloomberg's Mark Gurman said on Sunday. "I'm told the new models — code-named J714 and J716 — are slated...

New MacBook Pros Reportedly Launching Alongside macOS 26.3

Sunday February 1, 2026 5:42 am PST by Joe Rossignol

Apple is planning to launch new MacBook Pro models with M5 Pro and M5 Max chips alongside macOS 26.3, according to Bloomberg's Mark Gurman. "Apple's faster MacBook Pros are planned for the macOS 26.3 release cycle," wrote Gurman, in his Power On newsletter today. "I'm told the new models — code-named J714 and J716 — are slated for the macOS 26.3 software cycle, which runs from...

• 141 comments

Apple Gives Final Warning to Home App Users

Tuesday February 3, 2026 8:55 am PST by Joe Rossignol

In 2022, Apple introduced a new Apple Home architecture that is "more reliable and efficient," and the deadline to upgrade and avoid issues is fast approaching. In an email this week, Apple gave customers a final reminder to upgrade their Home app by February 10, 2026. Apple says users who do not upgrade may experience issues with accessories and automations, or lose access to their smart...

• 64 comments