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

iphone 17 models

No iPhone 18 Launch This Year, Reports Suggest

Thursday January 1, 2026 8:43 am PST by
Apple is not expected to release a standard iPhone 18 model this year, according to a growing number of reports that suggest the company is planning a significant change to its long-standing annual iPhone launch cycle. Despite the immense success of the iPhone 17 in 2025, the iPhone 18 is not expected to arrive until the spring of 2027, leaving the iPhone 17 in the lineup as the latest...
duolingo ad live activity

Duolingo Used iPhone's Dynamic Island to Display Ads, Violating Apple Design Guidelines

Friday January 2, 2026 1:36 pm PST by
Language learning app Duolingo has apparently been using the iPhone's Live Activity feature to display ads on the Lock Screen and the Dynamic Island, which violates Apple's design guidelines. According to multiple reports on Reddit, the Duolingo app has been displaying an ad for a "Super offer," which is Duolingo's paid subscription option. Apple's guidelines for Live Activity state that...
Low Cost A18 Pro MacBook Feature Pink

Apple's 2026 Low-Cost A18 Pro MacBook: What We Know So Far

Friday January 2, 2026 4:33 pm PST by
Apple is planning to release a low-cost MacBook in 2026, which will apparently compete with more affordable Chromebooks and Windows PCs. Apple's most affordable Mac right now is the $999 MacBook Air, and the upcoming low-cost MacBook is expected to be cheaper. Here's what we know about the low-cost MacBook so far. Size Rumors suggest the low-cost MacBook will have a display that's around 13 ...
govee floor lamp

CES 2026: Govee Announces New Matter-Connected Ceiling and Floor Lights

Sunday January 4, 2026 5:00 am PST by
Govee today introduced three new HomeKit-compatible lighting products, including the Govee Floor Lamp 3, the Govee Ceiling Light Ultra, and the Govee Sky Ceiling Light. The Govee Floor Lamp 3 is the successor to the Floor Lamp 2, and it offers Matter integration with the option to connect to HomeKit. The Floor Lamp 3 offers an upgraded LuminBlend+ lighting system that can reproduce 281...
Belkin 25W Battery magnetic

CES 2026: Belkin Announces Magnetic Ring Power Bank, Modular Dock, and More

Sunday January 4, 2026 3:02 pm PST by
Belkin today announced a range of new charging and connectivity accessories at CES 2026, expanding its portfolio of products aimed at Apple device users. UltraCharge Pro Power Bank 10K with Magnetic Ring The lineup includes new Qi2 and Qi2.2 wireless chargers, magnetic power banks, a high-capacity laptop battery, and USB-C productivity accessories, with an emphasis on higher charging...
airpods pro 3 glitter

AirPods New Year's Deals Include Up to $99 Off AirPods Max, AirPods Pro 3, and AirPods 4

Sunday January 4, 2026 8:04 am PST by
Now that the calendar has flipped over into January, steep discounts on popular Apple products have become more rare after the holidays. However, if you didn't get a new pair of AirPods recently and are looking for a model on sale, Amazon does have a few solid second-best prices this week. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a...
Low Cost MacBook Feature A18 Pro

Low-Price 12.9-Inch MacBook With A18 Pro Chip Reportedly Launching Early This Year

Friday January 2, 2026 9:08 am PST by
Apple plans to introduce a 12.9-inch MacBook in spring 2026, according to TrendForce. In a press release this week, the Taiwanese research firm said this MacBook will be aimed at the entry-level to mid-range market, with "competitive pricing." TrendForce did not share any further details about this MacBook, but the information that it shared lines up with several rumors about a more...
Clicks Communicator Feature

'Clicks Communicator' Unveiled — Will You Carry This With Your iPhone?

Friday January 2, 2026 6:35 am PST by
The company behind the BlackBerry-like Clicks Keyboard accessory for the iPhone today unveiled a new Android 16 smartphone called the Clicks Communicator. The purpose-built device is designed to be used as a second phone alongside your iPhone, with the intended focus being communication over content consumption. It runs a custom Android launcher that offers a curated selection of messaging...

Top Rated Comments

BornAgainMac Avatar
160 months ago
Fix the iMessage!

Maybe in Snow Mavericks.
Score: 25 Votes (Like | Disagree)
street.cory Avatar
160 months ago
I saw "Mavericks" and "Available in the Mac App Store" and wet my panties.
Score: 9 Votes (Like | Disagree)
pedrotaquelim Avatar
160 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)
tywebb13 Avatar
160 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
160 months ago
weird that they're not seeding it to devs yet.
Score: 5 Votes (Like | Disagree)
winston1236 Avatar
160 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)