Apple today seeded build 12D50 of OS X 10.8.3 Mountain Lion to developers, the fifth beta release reports 9to5Mac. The first 10.8.3 beta was seeded back in November, and the third and fourth releases were released in December.

1083
Though the update comes with no known issues or new features, as before Apple has asked developers to focus on AirPlay, AirPort, Game Center, Graphics Drivers, and Safari in their testing. Registered developers can download it via the Apple Developer Page.

Top Rated Comments

lcmazza Avatar
165 months ago
Here's what needs to be fixed:

1. Apple's laziness to launch an OS with so many glitches in their OWN unique hardware.

2. Stop adding BS social features and focus on quality.

3. If Apple wants to add new features, then start copying Windows 8 GREAT file copying and management. That is what desktop OSes do, anyway. This is not an iPad.
Score: 14 Votes (Like | Disagree)
Peace Avatar
165 months ago
I agree with the slow shutdown times. I had a 2007 iMac with Mountain Lion. I put Snow Leopard back on it to sell it.

Mountain Lion: 30-35 seconds to shutdown
Snow Leopard: 5 seconds to shutdown

Even with my newer 2011 iMac, shutdown times are around 30 seconds. It doesn't bother me. I just find it strange. :D

Well see now. Macs aren't used to being shut down or rebooted. That's a Windows thing.

:D
Score: 11 Votes (Like | Disagree)
KattDaDon Avatar
165 months ago
Image (https://cdn.macrumors.com/article-new/2013/01/1083.png)
Though the update comes with no known issues or new features, as before Apple has asked developers to focus on AirPlay, AirPort, Game Center, Graphics Drivers, and Safari in their testing. Registered developers can download it via the Apple Developer Page (https://developer.apple.com/).

GRAPHICS DRIVERS!!!!!!!!!!

I don't get why you re wrote this cause its already there in the article above
Score: 10 Votes (Like | Disagree)
daneoni Avatar
165 months ago
That's what snow leopard was for. Even still lion and mountain lion didn't really get any compelling features. Just social crap and dumbing down of a lot of stuff to make it more like ios (Quicktime being a prime example - they remove most of its preferences for no reason at all)
Quicktime 7 has a 32-bit API that is ancient. 64-bit is the future but taking Quicktime 7 to that future isn't a straightforward process (http://arstechnica.com/apple/2009/08/mac-os-x-10-6/6/) and will take time. And if you owned Quicktime 7 Pro, it still runs just fine on Mountain Lion. Its not like Apple yanked it or 'dumbed it down' for fun-sies. Also social/cloud integration isn't crap, its where we are in contemporary technology.
Score: 9 Votes (Like | Disagree)
3282868 Avatar
165 months ago
Here's what needs to be fixed:

1. Apple's laziness to launch an OS with so many glitches in their OWN unique hardware.

2. Stop adding BS social features and focus on quality.

3. If Apple wants to add new features, then start copying Windows 8 GREAT file copying and management. That is what desktop OSes do, anyway. This is not an iPad.
You can thank Craig Federighi for this as he took over as Senior Vice President of Software Engineering after Bertrand Serlet left in 2011. Serlet moved to Apple with Jobs from NeXT and was Senior VP in S.E., and was mainly responsible for Tiger, Leopard and Snow Leopard. Criag Federighi is a hack, responsible for allowing Forstall to incorporate iOS **** into OS X while dropping the ball on improved graphics drivers and OpenGL Core support, a revised HFS+ Finder system, lack of full multiple display support, "Mission Control", horrible memory management, and pushing for an annual release cycle. The odds are, it won't change.

EDIT Read post #85, as some have called my information into question I have added links and facts to support that Craig Federighi was head of OS X development two years prior to Serlet's March 2011 announcement for departure. Craig Federighi has been head of OS X development since his return to Apple in 2009.

Wednesday, March 23, 2011, 08:35 am
Serlet joined Apple in 1997 and has been involved in the definition, development and creation of Mac OS X. Before his time at Apple, Serlet spent four years at Xerox PARC, then joined NeXT with Jobs in 1989. He holds a doctorate in Computer Science from the University of Orsay, France.

"I've worked with Steve for 22 years and have had an incredible time developing products at both NeXT and Apple, but at this point, I want to focus less on products and more on science," Serlet said.

He will be replaced by Craig Federighi, Apple's vice president of Mac Software Engineering. In his new role, Federighi will assume Serlet's responsibilities and will report directly to Jobs.

Federighi is responsible for the development of Mac OS X, and has been managing the Mac OS software engineering group for the past two years. It was Federighi who gave a live demonstration of Mac OS X 10.7 Lion at a media event last October.

"Craig has done a great job managing the Mac OS team for the past two years," Serlet said. "Lion is a great release and the transition should be seamless."

Federighi worked at NeXT, followed by Apple, and spent a decade at Ariba where he held several roles including vice president of Internet Services and chief technology officer. He returned to Apple in 2009 to lead Mac OS X engineering. Federighi holds a Master of Science degree in Computer Science and a Bachelor of Science in Electrical Engineering and Computer Science from the University of California, Berkeley.
Score: 8 Votes (Like | Disagree)
sshhoott Avatar
165 months ago
Here's what needs to be fixed:
Issues related with Graphic drivers: Choppy Animations, Memory Leaks when apps use GPU/hardware acceleration, Kernal Panics.

Other problems: CRAZY Shutdown times, poor battery life.

Here's what should be added: GPU accelerated scrolling in Mail, Preview (similar to Safari), option to do a three dinger swipe in all apps when it's enabled in Trackpad settings.


Edit: I have a MBP 13" mid 2010. But I've also seen most of these problems on RetinaMBPs
Score: 8 Votes (Like | Disagree)

Popular Stories

Home Hub Command Center with Dome Base Feature

Apple Working on All-New Operating System

Saturday August 16, 2025 6:45 am PDT by
Apple is developing an all-new operating system codenamed "Charismatic," according to Bloomberg's Mark Gurman. Apple smart home hub concept This is likely Apple's long-rumored "homeOS" operating system. In a report this week, Gurman said both Apple's rumored smart home hub in 2026 and tabletop robot in 2027 will run the new operating system. He said the software platform will blend...
Golden Apple Logo

Every Apple Secret That Leaked Wednesday

Thursday August 14, 2025 4:13 am PDT by
Apple made a major slip Wednesday when it accidentally included hardware identifiers in software code linking to numerous unannounced products. The leaked information provided MacRumors with concrete evidence of Apple's hardware development across multiple product categories. Here's everything that was confirmed through the code discoveries: New HomePod mini with updated chip – New...
iPhone 17 Pro in Hand Feature Lowgo

iPhone 17 Pro Max's Internal Design With Metal Battery Allegedly Leaks

Friday August 15, 2025 9:13 am PDT by
Alleged images of the iPhone 17 Pro Max's internal design have surfaced, offering a potential look inside the device before it is announced by Apple next month. The images were shared by the account "yeux1122" this week, in a blog post on the Korean platform Naver. The account aggregates Apple rumors and leaks, so it is likely not the original source of the images, and it is unclear if they...
iPhone 17 Pro 3 4ths Perspective Aluminum Camera Module 1

Alleged iPhone 17 Pro Chassis Offers First Look at All-Aluminum Body

Thursday August 14, 2025 3:40 am PDT by
An alleged iPhone 17 Pro production leak may provide a first look at the device's milled all-aluminum chassis, which this year includes the camera bump – in contrast to last year's iPhone 16 Pro model that features a glass camera module attached to an all-glass back panel. Originally shared by leaker Majin Bu, the image below could be of a moulding, but it still lines up with rumors that...
Apple Watch Ultra 2 Complications

Apple Watch Reportedly Set to Receive 'Significant Redesign' Next Year

Friday August 15, 2025 1:31 pm PDT by
At least one new Apple Watch model launching next year will feature a "significant redesign," according to Taiwanese supply chain publication DigiTimes. In a paywalled report this week, citing supply chain insiders, DigiTimes claimed that a high-end 2026 Apple Watch model will feature "exterior design" changes, including but not limited to "eight sensors arranged in a ring pattern visible...
apple beta 26 lineup

Mark Gurman Responds to Last Week's Apple Device Leaks

Sunday August 17, 2025 7:03 am PDT by
Last week, Apple released and then pulled a software tool that accidentally contained identifiers for many unreleased devices and chips, according to MacRumors contributor Aaron Perris. His findings included new models of the Studio Display, Apple TV, Apple Watches, Apple Vision Pro, iPad mini, HomePod mini, and more. Here is what was uncovered in the file, according to MacRumors contributor ...
Apple TV 2025 Thumb 2

New Apple TV Coming Later This Year With A17 Pro Chip

Wednesday August 13, 2025 5:29 pm PDT by
Rumors suggest that Apple is working on an updated version of the Apple TV that's slated for launch later this year. Information about the upcoming device that was found in Apple code indicates that it will be equipped with the A17 Pro chip. There have been multiple rumors about a new Apple TV coming in 2025 with a new A-series processor, but it hasn't been clear which chip Apple would use...
AirPods Pro 3 Mock Feature

AirPods Pro 3 Could Be Just Weeks Away – Here's What We Know

Wednesday August 13, 2025 4:40 am PDT by
Despite being over two years old, Apple's AirPods Pro 2 still dominate the premium wireless‑earbud space, thanks to a potent mix of top‑tier audio, class‑leading noise cancellation, and Apple's habit of delivering major new features through software updates. Rumors suggest AirPods Pro 3 could arrive as soon as September 2025 alongside the iPhone 17 lineup, giving prospective AirPods...