Apple has seeded developers with a new build of OS X Mountain Lion (12C50) to developers this evening. The version contains complete release notes as posted by 9to5Mac, suggesting the release is near complete. Apple is holding a media even on Wednesday where they are likely to detail the new iPhone and iOS 6.
The release notes reveal the following features:
Facebook - Single sign on for Facebook - Facebook as an option when sharing links and photos - Facebook friends’ contact information and profile pictures in Contacts - Facebook notifications in Notification Center
Game Center - Share scores to Facebook, Twitter, Mail, or Messages - Facebook friends are included in Game Center friend recommendations - Facebook Like button for games - Challenge friends to beat your score or achievement
Other new features - Power Nap support for MacBook Air (Late 2010) - iMessages sent to your phone number now appear in Messages on your Mac - From Safari and Mail on your Mac you can add passes to Passbook on your iPhone or iPod touch running iOS 6 - New shared Reminders lists - FaceTime now receives calls sent to your phone number - New sort options allow you to sort notes by title, the date you edited them, and when you created them - Dictation now supports Mandarin, Cantonese, Spanish, Korean, Canadian English, Canadian French, and Italian - The Dictionary application now includes a French definition dictionary - Sina Weibo profile photos can now be added to Contacts
The 10.8.2 update also includes general operating system fixes that improve the stability, compatibility and security of your Mac, including the following fixes:
- An option to discard the changes in the original document when choosing Save As - Unsent drafts are opened automatically when launching Mail - Receive Twitter notifications for mentions and replies from anyone - URLs are shortened when sending tweets from Notification Center - Notifications are disabled when AirPlay Mirroring is being used - SSL support for Google searches from the Smart Search Field in Safari - New preference to have Safari launch with previously open webpages
One notable feature is the unification of the Apple ID and phone number in OS X Messages. As described by TheVerge:
Now, if someone calls your phone number for Facetime, you'll be able to answer on your Mac or iPad. The same goes for Messages — if you get an iMessage on your phone, it'll be delivered to your Mac and other iOS devices, even if the sender sent the message to your cell phone number and not your Apple ID email.
Apple will likely coordinate the release OS X Mountain Lion alongside iOS 6. We will learn more tomorrow at Apple's media event.
Friday December 5, 2025 9:40 am PST by Tim Hardwick
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below.
Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
Tuesday December 2, 2025 11:09 am PST by Juli Clover
Apple is encouraging iPhone users who are still running iOS 18 to upgrade to iOS 26 by making the iOS 26 software upgrade option more prominent.
Since iOS 26 launched in September, it has been displayed as an optional upgrade at the bottom of the Software Update interface in the Settings app. iOS 18 has been the default operating system option, and users running iOS 18 have seen iOS 18...
Wednesday December 3, 2025 10:33 am PST by Juli Clover
Apple today seeded the release candidate versions of upcoming iOS 26.2 and iPadOS 26.2 updates to developers and public beta testers, with the software coming two weeks after Apple seeded the third betas. The release candidates represent the final versions of iOS 26.2 and iPadOS 26.2 that will be provided to the public if no further bugs are found during this final week of testing....
Thursday December 4, 2025 9:30 am PST by Joe Rossignol
In a statement shared with Bloomberg on Wednesday, Apple confirmed that its software design chief Alan Dye will be leaving. Apple said Dye will be succeeded by Stephen Lemay, who has been a software designer at the company since 1999.
Meta CEO Mark Zuckerberg announced that Dye will lead a new creative studio within the company's AR/VR division Reality Labs.
On his blog Daring Fireball,...
Monday December 1, 2025 4:37 pm PST by Juli Clover
We're getting closer to the launch of the final major iOS update of the year, with Apple set to release iOS 26.2 in December. We've had three betas so far and are expecting a fourth beta or a release candidate this week, so a launch could follow as soon as next week.
Past Launch Dates
Apple's past iOS x.2 updates from the last few years have all happened right around the middle of the...
Monday December 1, 2025 3:00 am PST by Tim Hardwick
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device.
Subscribe to the MacRumors YouTube channel for more videos.
Below, we've collated an updated set of key details that ...
Friday December 5, 2025 10:08 am PST by Joe Rossignol
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone.
In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
A U.S. appeals court has upheld a temporary restraining order that prevents OpenAI and Jony Ive's new hardware venture from using the name "io" for products similar to those planned by AI audio startup iyO, Bloomberg Law reports.
iyO sued OpenAI earlier this year after the latter announced its partnership with Ive's new firm, arguing that OpenAI's planned "io" branding was too close to its...
The iPhone Air has recorded the steepest early resale value drop of any iPhone model in years, with new data showing that several configurations have lost almost 50% of their value within ten weeks of launch.
According to a ten-week analysis published by SellCell, Apple's latest lineup is showing a pronounced split in resale performance between the iPhone 17 models and the iPhone Air....
Thursday December 4, 2025 5:18 am PST by Tim Hardwick
iPhone 17 Pro models, it turns out, can't take photos in Night mode when Portrait mode is selected in the Camera app – a capability that's been available on Apple's Pro devices since the iPhone 12 Pro in 2020.
If you're an iPhone 17 Pro or iPhone 17 Pro Max owner, try it for yourself: Open the Camera app with Photo selected in the carousel, then cover the rear lenses with your hand to...
Apple has seeded developers with a new build of OS X Mountain Lion (12C50) to developers this evening. The version contains complete release notes as posted by 9to5Mac, suggesting the release is near complete. Apple is holding a media even on Wednesday where they are likely to detail the new iPhone and iOS 6. 
