Apple Seeds New 13A598 Build of Mavericks to AppleSeed Members - MacRumors
Skip to Content

Apple Seeds New 13A598 Build of Mavericks to AppleSeed Members

Apple has seeded a new release of OS X Mavericks to members of the AppleSeed beta testing program, a little more than two weeks after the release of the eighth Developer Preview. DP 8 had a version number of 13A584, while today's release is build 13A598.

Appleseedbuild
Separately, 9to5Mac reports that this build may be a GM candidate, according to AppleSeed members, while other sources have said the final release build will be several versions newer. The OS was reportedly nearly ready for release a few weeks ago, but was pushed back because of "critical bugs".

Since being announced at WWDC, OS X Mavericks is said to have picked up a few minor unannounced features. Namely, the Messages and FaceTime applications have received the ability to block phone numbers and Apple IDs from sending the Mavericks user messages and/or FaceTime calls. This addition brings parity to iOS 7 and the two operating systems will sync in this manner.

OS X Mavericks, which is expected to be released this fall, includes multiple new features like a tabbed Finder, full screen dual monitor capabilities, Safari improvements, and a new Maps app.

Apple is reportedly targeting a late October launch for OS X Mavericks.

Related Forum: OS X Mavericks

Popular Stories

Apple iCloud Plus expansion hero

iCloud+ Now Includes Apple TV, Apple Arcade, and Curated Apple Music Stations in Over 100 Countries

Tuesday September 15, 2026 1:43 am PDT by
Apple today announced a new subscription initiative that turns paid iCloud+ subscriptions into a broader services bundle in more than 100 countries. In select countries, Apple says every paid iCloud+ plan, including the cheapest 50GB tier, now includes Apple TV and Apple Arcade "at no additional cost," while family sharing extends the storage, TV and Arcade access to up to five people....
Everything New Your iPhone Can Do on iOS 27 Feature 1

50 New Things Your iPhone Can Do in iOS 27 - Out Now!

Monday September 14, 2026 10:48 pm PDT by
Apple released iOS 27 this week, and despite the company's focus this year on refining its flagship operating system and nixing bugs, there are still many additional features to explore, not least of which is Apple's new context-aware Siri, re-tooled for the generative AI era. Which iPhones Support Every iOS 27 Feature? This year's major iPhone software update isn't all about AI, though,...
iOS 27 Icon iPhone

iOS 27 Available Now With These 8 New Features

Monday September 14, 2026 9:00 am PDT by
Update — 10 a.m. Pacific Time: Apple has released iOS 27. During its iPhone 18 Pro and iPhone Duo event last week, Apple announced that iOS 27 will be released widely on Monday, September 14. iOS 27 should be available around 10 a.m. Pacific Time / 1 p.m. Eastern Time today via the Settings app, under General → Software Update. Below, we have highlighted eight new features and...

Top Rated Comments

BornAgainMac Avatar
169 months ago
Fix the iMessage!

Maybe in Snow Mavericks.
Score: 25 Votes (Like | Disagree)
street.cory Avatar
169 months ago
I saw "Mavericks" and "Available in the Mac App Store" and wet my panties.
Score: 9 Votes (Like | Disagree)
169 months ago
i couldn't have been less excited about a release of a new OS.
block calls? useful for a phone but to me, not so much in my computer.
tabbed finder? nice but don't need.
full screen dual monitor? don't have two monitors.
safari improvements? ditched that in favour of chrome a while ago.
maps app? lol no thank you.
i'll be keeping ML which works great.


"i'll be keeping ML which works great."
You liar.
Score: 6 Votes (Like | Disagree)
169 months ago
Maybe they are colours

Notice that the desktop picture for mavericks has various shades of green.

Like this (13a598):



For DP8 we have 13a584 which is this shade:



In DP1 we had 13a476:

Score: 5 Votes (Like | Disagree)
Sky Blue Avatar
169 months ago
weird that they're not seeding it to devs yet.
Score: 5 Votes (Like | Disagree)
169 months ago
I wonder if they fixed the finder issue in mountain lion

----------

I agree, but I love tabs in Finder, but use TotalFinder. But there are a countless "under-the-hood" improvements that I am looking forward to.

Snow Leopard was the best ever and still is.
Score: 4 Votes (Like | Disagree)