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 Rumored to Announce New Product on February 19

Thursday February 5, 2026 12:22 pm PST by Joe Rossignol

Apple plans to announce the iPhone 17e on Thursday, February 19, according to Macwelt, the German equivalent of Macworld. The report, citing industry sources, is available in English on Macworld. Apple announced the iPhone 16e on Wednesday, February 19 last year, so the iPhone 17e would be unveiled exactly one year later if this rumor is accurate. It is quite uncommon for Apple to unveil...

Tim Cook Teases Plans for Apple's Upcoming 50th Anniversary

Thursday February 5, 2026 12:54 pm PST by Joe Rossignol

Apple turns 50 this year, and its CEO Tim Cook has promised to celebrate the milestone. The big day falls on April 1, 2026. "I've been unusually reflective lately about Apple because we have been working on what do we do to mark this moment," Cook told employees today, according to Bloomberg's Mark Gurman. "When you really stop and pause and think about the last 50 years, it makes your heart ...

• 148 comments

Apple Shows Off a Key Reason to Upgrade to the iPhone 17

Saturday February 7, 2026 9:26 am PST by Joe Rossignol

Apple today shared an ad that shows how the upgraded Center Stage front camera on the latest iPhones improves the process of taking a group selfie. "Watch how the new front facing camera on iPhone 17 Pro takes group selfies that automatically expand and rotate as more people come into frame," says Apple. While the ad is focused on the iPhone 17 Pro and iPhone 17 Pro Max, the regular iPhone...

• 79 comments

Why Apple's iOS 26.4 Siri Upgrade Will Be Bigger Than Originally Promised

Friday February 6, 2026 3:06 pm PST by Juli Clover

In the iOS 26.4 update that's coming this spring, Apple will introduce a new version of Siri that's going to overhaul how we interact with the personal assistant and what it's able to do. The iOS 26.4 version of Siri won't work like ChatGPT or Claude, but it will rely on large language models (LLMs) and has been updated from the ground up. Upgraded Architecture The next-generation...

• 154 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

While the iOS 26.3 Release Candidate is now available ahead of a public release, the first iOS 26.4 beta is likely still at least a week 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...

• 37 comments