Apple Seeds New Build of OS X Mavericks Golden Master

Apple has seeded a new build of the OS X Mavericks Golden Master to developers, a little more than two weeks after the first GM seed. According to 9to5Mac, the build is only available for users performing a fresh install of Mavericks, with some users having luck re-installing the new GM over the prior version.

mavericks
The prior GM had a build number of 13A598, while the new release is build 13A603. Apple is reportedly targeting a late October launch for Mavericks and it's possible the company will give a final release date at Tuesday's media event.

Related Forum: OS X Mavericks

Popular Stories

Apple Logo Zoomed

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

Thursday February 5, 2026 12:54 pm PST by
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 ...
wwdc sans text feature

Apple Rumored to Announce New Product on February 19

Thursday February 5, 2026 12:22 pm PST by
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...
Finder Siri Feature

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

Friday February 6, 2026 3:06 pm PST by
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...
iOS 26

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

Tuesday February 3, 2026 7:47 am PST by
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...
maxresdefault

Apple Shows Off a Key Reason to Upgrade to the iPhone 17

Saturday February 7, 2026 9:26 am PST by
Apple today shared an ad that shows how the upgraded Center Stage front camera on the latest iPhones improves the process of taking a group selfie. "Watch how the new front facing camera on iPhone 17 Pro takes group selfies that automatically expand and rotate as more people come into frame," says Apple. While the ad is focused on the iPhone 17 Pro and iPhone 17 Pro Max, the regular iPhone...

Top Rated Comments

PaulOBrain Avatar
161 months ago
I do know for sure. You can't upgrade the old GM build to the new version. It forces you to do a clean install.

Funny, as some users have done just that. So again, stop spreading misinformation.
Score: 17 Votes (Like | Disagree)
PaulOBrain Avatar
161 months ago

One thing is for sure anyone who has invested a whole lot of time installing and setting up their new Mavericks install has wasted it. That is, unless you're happy being stuck on 10.9.0 until 10.10 comes out.

Stop spreading misinformation. You don't know for sure.
Score: 14 Votes (Like | Disagree)
petvas Avatar
161 months ago
I do know for sure. You can't upgrade the old GM build to the new version. It forces you to do a clean install.

not true. You can update with no issues. I updated both my laptops today..
Score: 12 Votes (Like | Disagree)
petvas Avatar
161 months ago
I have posted this 10 hours ago.
https://forums.macrumors.com/showthread.php?t=1656469

Why do Macrumors need another thread for that?

I also tipped 9to5Mac...
Score: 11 Votes (Like | Disagree)
juanmanas Avatar
161 months ago
I have posted this 10 hours ago.
https://forums.macrumors.com/showthread.php?t=1656469

Why do Macrumors need another thread for that?

I also tipped 9to5Mac...

Are you in need of affection or public recognition?
Score: 10 Votes (Like | Disagree)
Tyler23 Avatar
161 months ago
Typically I would say yes, it will expire and require a reinstall only because you wont have the "official gm" that will ship to the public. In essence, the original gm becomes a beta that expires.

OS X Developer Previews do not expire.

GM builds are built to be the final version. Updates are only issued if there are major problems. Not only do Developer Preview's (betas) not expire, but a build built to be the final version definitely does not expire.
Score: 10 Votes (Like | Disagree)