Apple Issues Update to OS X Mountain Lion Developer Preview 3

install
Apple issued a software update for OS X Mountain Lion Developer Preview 3 this evening. Apple released Developer Preview 3 to developers. The update brings the build number of Mountain Lion up to 12A193i (from 12A178q).

If you already have Mountain Lion Developer Preview 3 installed, choose Software Update from the Apple menu to download the update from the Mac App Store. Download Xcode 4.4 Developer Preview 4 from the Mac Dev Center to continue building apps for Mountain Lion Developer Preview 3 Update.

One change noted by 9to5Mac is the addition of a "Do Not Disturb" setting to Mountain Lion's Notifications Center:

ncdnt
Besides the Notification Center, Mountain Lion also borrows a number of other features from iOS, such as Reminders, Messages, and Game Center. Apple first previewed Mountain Lion back in February and promises deliver to customers in late summer 2012.

Popular Stories

Apple Shopping Event 2025

Apple Announces 2025 Black Friday Event, Here's What You Can Get

Thursday November 20, 2025 6:28 am PST by
Apple's annual four-day Black Friday through Cyber Monday shopping event is returning on Friday, November 28 through Monday, December 1 in many countries, including the United States, Canada, Australia, New Zealand, France, Germany, Italy, Spain, the United Kingdom, Belgium, the Netherlands, Sweden, Thailand, and others. During the shopping event, customers can get an Apple gift card with...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Wednesday November 19, 2025 4:00 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
iOS 26

Everything New in iOS 26.2 Beta 3

Monday November 17, 2025 3:20 pm PST by
Apple provided developers with the third beta of an upcoming iOS 26.2 update, and there are still new features that are being added with each beta that we get. We've rounded up all of the changes that Apple made in beta 3. AirDrop Apple added new AirDrop functionality, providing a way for two people to share files temporarily without having to add one another as contacts. iOS 26.2...
applecare apple care banner

Apple Brings New AppleCare+ Options to India

Tuesday November 18, 2025 8:42 am PST by
Apple today announced an expansion of AppleCare+ coverage in India, with new options for monthly and annual plans, and the addition of Theft and Loss for iPhone for the first time. Options for monthly and annual AppleCare+ plans in India provide more choice and flexibility, allowing users to keep coverage for as long as they require. Apple's vice president of Worldwide iPhone Product...
ipad mini 7 feature red and blue

iPad Mini 8: Four Major New Features to Expect

Wednesday November 19, 2025 7:50 am PST by
Apple's eighth-generation iPad mini is highly likely to arrive next year, offering a significant refresh of the device with at least four major new features. OLED Display The next-generation version of the iPad mini could feature an OLED display, as part of Apple's plan to expand the display technology across many more of its devices. Apple's first OLED device was the Apple Watch in 2015, ...
iOS 26

iOS 26.2 Adds These New Features to Your iPhone

Thursday November 20, 2025 10:50 am PST by
iOS 26.2 is currently in beta testing. The upcoming update includes a handful of new features and changes on the iPhone, including a new Liquid Glass slider for the Lock Screen's clock, offline lyrics for Apple Music, and more. In a recent press release, Apple confirmed that iOS 26.2 will be released to all users in December, but it did not provide a specific release date. Keep reading...
iPhone 17 Pro and Air N1 Feature

iPhone 17 vs. iPhone 16 Wi-Fi Speeds: New Study Reveals the Winner

Tuesday November 18, 2025 10:53 am PST by
A new study has revealed that the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air achieve significantly faster average Wi-Fi speeds compared to the iPhone 16 series, thanks to Apple's custom-designed N1 chip. The study was conducted by Ookla, the company behind the popular Speedtest website and app. It said the results are based on global, crowdsourced Speedtest user data...
Apple Wallet ID Illinois

iPhone Driver's License Feature Launching in Illinois

Tuesday November 18, 2025 8:47 am PST by
In select U.S. states, residents can add their driver's license or state ID to the Wallet app on the iPhone and Apple Watch, providing a convenient and contactless way to display proof of identity or age at select airports and businesses, and in select apps. Starting this Wednesday, November 19, the feature will be available to residents of Illinois. The announcement confirmed that the...
macbook black friday

The Best Early Black Friday Mac Deals

Tuesday November 18, 2025 7:32 am PST by
We're getting closer to Black Friday, which lands next week on Friday, November 28. In the lead-up to the shopping holiday, we're tracking a few lowest-ever prices on Apple's most popular Macs, including the M4 MacBook Air and brand new M5 MacBook Pro. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment,...
hikawa phone grip stand apple%402x

Apple Launches Second Limited-Edition iPhone Accessory in a Month

Friday November 21, 2025 3:53 am PST by
Apple has begun selling the Hikawa Phone Grip and Stand, a new limited-edition iPhone accessory designed with accessibility in mind. Designed by LA-based Bailey Hikawa to celebrate the 40th anniversary of accessibility at Apple, the grip uses magnets to securely snap onto any iPhone with MagSafe. Apple says it can be removed with ease, and doubles as a stand with two different viewing...

Top Rated Comments

MadMitch89 Avatar
177 months ago
Option to ungroup windows is now in Mission Control preference pane. This should make a lot of people happy.
Score: 41 Votes (Like | Disagree)
SeaFox Avatar
177 months ago
(https://cdn.macrumors.com/im/macrumorsthreadlogodarkd.png)

Highly informative picture.
Good inclusion to this news story.
Score: 35 Votes (Like | Disagree)
Exotic-Car Man Avatar
177 months ago
There's one thing I have started to hate about Apple - Bad UI design.

I mean - we have great UI experts at Apple and some of the UI elements on OS X and iOS are just so bad-looking.

Just look at the volume bar or status bar on iOS, notification centre on iPad and OS X, now this switch button with the exact same UI from iOS, the whole final cut pro in helvetica.

There's something wrong going on in 1 Infinite Loop. Apple needs to come up with much more innovating and better looking UI designs even those these ones solve a purpose and do it just fine. It's all we Apple geeks have craved for years - great UI design and its implementation.
The only real issue I have with Apple's new GUIs is the amount of gray impeding on what used to be a colorful OS. That was certainly a harsh jump from Snow Leopard to Lion. Other than color, I don't really see a decline in GUI quality from Apple. I would certainly feel different if Apple's new OS booted up to a bunch of squares, however. *cough*Windows 8*cough*

Some pro-Apple people on this forum are seriously butthurt over any critical comments made. Sad thing, is they fail to understand that this is for our benefit as well as for Apple.

This was used to be a constructive forum - now its just people getting butthurt over any critical comments made on Apple or Apple products. Grow up.
Or perhaps they just disagree with you. After all, this is an Apple-oriented forum, so one could safely assume that most users on here enjoy the look and feel of Apple products.
Score: 19 Votes (Like | Disagree)
ZacNicholson Avatar
177 months ago
Could u please post a preview where is lets say more windows from one app so we will see "ungrouped" windows ?:)

Thank you!

here
Score: 17 Votes (Like | Disagree)
g-7 Avatar
177 months ago
Yea, Im still on 10.6, too and my only hope since dev version of Lion was to get back Expose.

Expose in 10.6 is already wrong. Last really useful Expose was in 10.5. In 10.6 they added windows scaling, which is disorienting (big Safari window is displayed in the same size as little download window, making it hard to quickly find the one I'm looking for). Mission Control in Lion was in fact a step in right direction: windows aren't scaled any more. And now in ML it's back to the old, real Expose: not scaled windows, all visible at the same time.

Can't wait for the release!
Score: 12 Votes (Like | Disagree)
Haribokart Avatar
177 months ago
There is now an option to use Spaces instead of Mission Control, amazing!
Score: 11 Votes (Like | Disagree)