Apple Seeds Golden Master of OS X Mountain Lion to Developers

200newfeatures
"200 New Features" Mountain Lion slide shown at WWDC

Apple released the Golden Master (GM) version of OS X Mountain Lion to developers today. The "golden master" designation indicates that this version of the software is intended to be the final version released to the public, barring any last-minute issues. The Build is 12A269.

Apple first previewed Mountain Lion in February, highlighting many features already present in iOS, including Messages, Reminders, Notes, Notification Center, Game Center and more at that time. At WWDC, Apple announced additional features, including Dictation, iCloud Tabs, and 'Power Nap'.

We previously highlighted this video which shows off many of the new features found in Mountain Lion:


Mountain Lion will be priced at $19.99 and released to the Mac App Store in July.

Popular Stories

iOS 18 Siri Personal Context

Report Reveals Internal Chaos Behind Apple's Siri Failure

Thursday April 10, 2025 7:15 am PDT by
A new report from The Information today reveals much of the internal turmoil behind Apple Intelligence's revamped version of Siri. Apple apparently weighed up multiple options for the backend of Apple Intelligence. One initial idea was to build both small and large language models, dubbed "Mini Mouse" and "Mighty Mouse," to run locally on iPhones and in the cloud, respectively. Siri's...
Apple 2025 Thumb 1

10 Products Still Coming From Apple in 2025

Friday April 11, 2025 4:14 pm PDT by
Apple may have updated several iPads and Macs late last year and early this year, but there are still multiple new devices that we're looking forward to seeing in 2025. Most will come in September or October, but there could be a few surprises before then. We've rounded up a list of everything that we're still waiting to see from Apple in 2025. iPhone 17, 17 Air, and 17 Pro - We get...
M6 MacBook Pro Feature 1

Waiting for the Perfect MacBook Pro? 2026 Might Be the Year

Thursday April 10, 2025 4:19 am PDT by
Apple in October 2024 overhauled its 14-inch and 16-inch MacBook Pro models, adding M4, M4 Pro, and M4 Max chips, Thunderbolt 5 ports on higher-end models, display changes, and more. That's quite a lot of updates in one go, but if you think this means a further major refresh for the MacBook Pro is now several years away, think again. Bloomberg's Mark Gurman has said he expects only a small...
maxresdefault

The MacRumors Show: New iOS 19, iPhone 17, and Apple Watch Ultra 3 Leaks

Friday April 11, 2025 7:13 am PDT by
On this week's episode of The MacRumors Show, we catch up on the latest iOS 19 and watchOS 12 rumors, upcoming devices, and more. Subscribe to The MacRumors Show YouTube channel for more videos Detailed new renders from leaker Jon Prosser claim to provide the best look yet at the complete redesign rumored to arrive in iOS 19, showing more rounded elements, lighting effects, translucency, and...
Alleged iOS 19 Icons Front Page Tech

iOS 19 Leak Reveals Alleged New Design With Rounder App Icons, Floating Tab Bar, and More

Monday April 7, 2025 3:13 pm PDT by
YouTube channel Front Page Tech is back today with another video that provides a closer look at iOS 19's alleged design changes. The video contains re-created renders of iOS 19, which are allegedly based on real footage of the software update, provided by sources within Apple. Overall, iOS 19 is expected to have a more glass-like, visionOS-inspired design, with added translucency for user...
iPhone 17 Pro 3 4ths Perspective Aluminum Camera Module 1

iPhone 17 Pro Launching Later This Year With These 12 New Features

Sunday April 13, 2025 7:52 am PDT by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of April 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...
Apple Northbrook

Apple Store in Chicago Area Permanently Closing Later This Month

Wednesday April 9, 2025 9:56 am PDT by
Apple will be permanently closing its store at the Northbrook Court shopping mall in the Chicago suburb of Northbrook on April 26, the company has announced. Apple has added the following notice to the store's web page:Thank you Northbook. Apple Northbrook is closing on April 26 at 7pm. We're still here for you. Please visit apple.com/retail to find your nearest store.Apple Northbrook opened ...
iOS 18

iOS 18.5 Includes Two Changes So Far

Wednesday April 9, 2025 9:09 am PDT by
Apple released the first beta of iOS 18.5 last week, and so far the software update includes only two minor changes. The changes are in the Mail and Settings apps. In the Mail app, you can now easily turn off contact photos directly within the app, by tapping on the circle with three dots in the top-right corner. In the Settings app, there is some new AppleCare+ information. For ...
apple intelligence black

NYT: Apple's AI Struggles Began with 2023 Chip Budget Dispute

Friday April 11, 2025 4:33 am PDT by
Apple's current struggles with Apple Intelligence and Siri began in early 2023 when AI head John Giannandrea sought approval from CEO Tim Cook to purchase more AI chips for development, according to a new report from The New York Times. Cook initially approved doubling the team's chip budget, but CFO Luca Maestri reportedly reduced the increase to less than half that amount, and instead...

Top Rated Comments

heisenberg123 Avatar
167 months ago
Can anyone give me a download link please?

not sure whats worse
a) not knowing how to obtain things illegally on net in 2012
b) asking for help to do it on a forum thats so against it
Score: 72 Votes (Like | Disagree)
Tonewheel Avatar
167 months ago
[SIZE="4"]I'm honestly not that excited about this upgrade. Nothing exciting has really come out since Tiger or Leopard in my opinion. Most of these new features will be used for like 5 minutes by the mainstream user because they're just not that important (i.e. Reminders). And they also end up taking up more precious RAM & most importantly, battery life (on a laptop). Can someone name something that is really that ground breaking in this release? It just seems like things were reorganized & tweaked a bit.

P.S.
I've been in the Apple game since 1985, so I know a good Apple product when I see it. I'm not saying this is bad, but it's just not that amazing. Maybe OS 11 will be exciting?
[/SIZE]

Please type larger next time.
Score: 61 Votes (Like | Disagree)
thelink Avatar
167 months ago
Can anyone give me a download link please?

https://developer.apple.com/ (https://developer.apple.com/)
That's a good place to start. Have fun. :)
Score: 26 Votes (Like | Disagree)
cadillac1234 Avatar
167 months ago
Bye bye Lion

Seems like we hardly got to know each other :o
Score: 24 Votes (Like | Disagree)
gspannu Avatar
167 months ago
Hooray…..

Just released, 10.8 GM build.

Downloading as I type….
Score: 22 Votes (Like | Disagree)
ScottishDuck Avatar
167 months ago
A reminder on how to make your own USB copy. Requires a 8GB+ USB drive

*Download the installer from the app store.

*Right-click installer -> "Show Package Contents"



*Contents -> Shared Support -> InstallESD.dmg (open it/mount it)



*Open the terminal and copy this command:

open /Volumes/Mac\ OS\ X\ Install\ ESD/BaseSystem.dmg


*Now open Diskutility and "restore" BaseSystem.dmg to your USB drive.

***PLEASE NOTE THIS REQUIRES YOUR USB HAS A GUID PARTITION TABLE***

[Changing partition table to GUID]




[Restoring the DMG]


*Now open your newly restored USB drive



*System -> Installation



*Delete the link called "Packages" and then create a new folder with the same name





*Open the terminal again and copy this to it:

open /Volumes/Mac\ OS\ X\ Install\ ESD/Packages


*Copy everything in this folder to the "Packages" folder you created on your USB.





**Note this stage might take a while**



Hurray you now have a working installer.

----------------------------------------------------------------------------------------

A note:

This guide may seem different to others you have seen but it works better:

*The standard installer will copy the installation DMG to your hard drive and then re-run the installation using that. i.e you are needlessly running the install twice. My way doesn't do that.

*This installer allows you to clean install
Score: 20 Votes (Like | Disagree)