Got a tip for us?Let us know

a. Send us an email
b. Anonymous form

Apple Seeds Build 12D65 of OS X Beta 10.8.3 to Developers

Wednesday February 6, 2013 1:23 PM PST by Juli Clover

12d61 Apple today seeded build 12D65 of OS X Mountain Lion 10.8.3 to developers, marking the ninth beta iteration of the newest version of Mountain Lion. 10.8.3 was first seeded to developers in November 2012.

Build 12D65 comes exactly one week after build 12D61. As with build 12D61, build 12D65 continues to ask developers to focus on AirPlay, AirPort, Game Center, Graphics Drivers, and Safari.

Registered developers can download the update on Apple's Developer Page.

Update: According to 9to5Mac, the new build fixes the file bug that recently made headlines.

This post originally referred to Build 12D65 as the tenth developer seed of OS X 10.8.3 when it was actually the ninth seed.

Top Rated Comments

anzio

170 months ago

This will be very well tested.

Score: 13 Votes (Like | Disagree)

zin

170 months ago

I've managed to do some undercover work and have the change log. You can view it below:

* Fixes some bugs nobody suffers from
* Doesn't add anything new
* Claims to improve stability and performance

Score: 12 Votes (Like | Disagree)

Sky Blue

170 months ago

The never ending beta.

Score: 8 Votes (Like | Disagree)

Peace

170 months ago

Shutdown times appeared faster a few builds back, but seem slow once again. Although, they don't appear to be as slow as 10.8.2.

I'm seeing a few new bugs I haven't seen in previous builds.
I had duplicate cursers on my screen a moment ago.
Every time I log out, the desktop picture freezes in the middle of fading to the fabric background of the Login Window. Very jarring.

File a bug report.

Score: 5 Votes (Like | Disagree)

thatsfinebut

170 months ago

I hope that after they release 10.8.3, they release an update to Bootcamp so I can install Windows 8 (with full support).

Score: 5 Votes (Like | Disagree)

thomaskc

170 months ago

Are these mentioned only in the installer? there is a screenshot of these 2 features?

I took a screenshot of the installer:

Score: 4 Votes (Like | Disagree)

Read All Comments

Popular Stories

Tim Cook Teases Plans for Apple's Upcoming 50th Anniversary

Thursday February 5, 2026 12:54 pm PST by Joe Rossignol

Apple turns 50 this year, and its CEO Tim Cook has promised to celebrate the milestone. The big day falls on April 1, 2026. "I've been unusually reflective lately about Apple because we have been working on what do we do to mark this moment," Cook told employees today, according to Bloomberg's Mark Gurman. "When you really stop and pause and think about the last 50 years, it makes your heart ...

• 148 comments

Apple Rumored to Announce New Product on February 19

Thursday February 5, 2026 12:22 pm PST by Joe Rossignol

Apple plans to announce the iPhone 17e on Thursday, February 19, according to Macwelt, the German equivalent of Macworld. The report, citing industry sources, is available in English on Macworld. Apple announced the iPhone 16e on Wednesday, February 19 last year, so the iPhone 17e would be unveiled exactly one year later if this rumor is accurate. It is quite uncommon for Apple to unveil...

Why Apple's iOS 26.4 Siri Upgrade Will Be Bigger Than Originally Promised

Friday February 6, 2026 3:06 pm PST by Juli Clover

In the iOS 26.4 update that's coming this spring, Apple will introduce a new version of Siri that's going to overhaul how we interact with the personal assistant and what it's able to do. The iOS 26.4 version of Siri won't work like ChatGPT or Claude, but it will rely on large language models (LLMs) and has been updated from the ground up. Upgraded Architecture The next-generation...

• 154 comments

iOS 26.3 and iOS 26.4 Will Add These New Features to Your iPhone

Tuesday February 3, 2026 7:47 am PST by Joe Rossignol

While the iOS 26.3 Release Candidate is now available ahead of a public release, the first iOS 26.4 beta is likely still at least a week away. Following beta testing, iOS 26.4 will likely be released to the general public in March or April. Below, we have recapped known or rumored iOS 26.3 and iOS 26.4 features so far. iOS 26.3 iPhone to Android Transfer Tool iOS 26.3 makes it easier...

• 37 comments

iPhone 18 Pro Max Rumored to Deliver Next-Level Battery Life

Friday February 6, 2026 5:14 am PST by Hartley Charlton

The iPhone 18 Pro Max will feature a bigger battery for continued best-in-class battery life, according to a known Weibo leaker. Citing supply chain information, the Weibo user known as "Digital Chat Station" said that the iPhone 18 Pro Max will have a battery capacity of 5,100 to 5,200 mAh. Combined with the efficiency improvements of the A20 Pro chip, made with TSMC's 2nm process, the...

• 107 comments