Apple Issues Update to OS X Mountain Lion Developer Preview 3 - MacRumors
Skip to Content

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 back to school sans airpods 2

Apple's 2026 Back to School Offer is Coming Soon

Sunday July 12, 2026 7:29 am PDT by
Apple's stores will be rolling out Back to School marketing materials this week, according to Bloomberg's Mark Gurman. This suggests that the offer will begin in the U.S. in the next few days. Last year, college students and educational staff could receive a free accessory like AirPods 4 or an Apple Pencil Pro with the purchase of a qualifying Mac or iPad model. The Back to School offer is in...
Waze logo

5 New Waze Features Rolling Out Now: Here Are All the Details

Monday July 13, 2026 3:42 am PDT by
Google today announced that Waze is getting a handful of new features, including some Gemini-powered personalization enhancements for Conversational Reporting. Conversational Reporting already uses Gemini when users report traffic incidents like slowdowns, but now you can use it to suggest map updates like road closures or outdated addresses. Saying something like "The road is closed here"...
Mac Pro Feature Teal

Apple's M7 Ultra Chip Designed to Match a 2019 Mac Pro Feat

Sunday July 12, 2026 8:53 am PDT by
Apple's M7 Ultra chip coming in 2028 is designed to support up to 1.5TB of unified memory, according to Bloomberg's Mark Gurman. However, whether such a configuration is offered may depend on the state of the ongoing memory chip shortage. In 2019, Apple released an Intel-based Mac Pro with up to 1.5TB RAM....

Top Rated Comments

185 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
185 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
185 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
185 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
185 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
185 months ago
There is now an option to use Spaces instead of Mission Control, amazing!
Score: 11 Votes (Like | Disagree)