Apple Seeds New Build of OS X Mavericks Golden Master - MacRumors
Skip to Content

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

iOS 26

iOS 26.4 Adds Two New Features to CarPlay

Tuesday March 24, 2026 1:55 pm PDT by
iOS 26.4 was released today, and it includes a couple of new features for CarPlay: an Ambient Music widget and support for voice-based chatbot apps. To update your iPhone 11 or newer to iOS 26.4, open the Settings app and tap on General → Software Update. CarPlay will automatically offer the new features so long as the iPhone connected to your vehicle is running iOS 26.4 or later....
Apple Business hero

Apple Unveils 'Apple Business' All-in-One Platform

Tuesday March 24, 2026 8:53 am PDT by
Apple today announced Apple Business, a new all-in-one platform that unifies device management, productivity tools, and customer outreach features. The service is designed to be a consolidated replacement for several of Apple's existing business-focused offerings, including Apple Business Essentials, Apple Business Manager, and Apple Business Connect. It provides organizations with a single...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 3, AirPods Pro 2 and AirPods 4

Tuesday March 24, 2026 12:31 pm PDT by
Apple today released new firmware for the AirPods Pro 2, AirPods Pro 3, and the AirPods 4. The firmware has a version number of 8B39, up from 8B34 on the AirPods Pro 3, 8B28 on the AirPods Pro 2, and 8B21 on the AirPods 4. There is no word on what's included in the firmware, but Apple has a support document with limited notes. Most updates are limited to bug fixes and performance...

Top Rated Comments

162 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)
162 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
162 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
162 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)
162 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
162 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)