mavericks.pngApple today seeded build 13E19 of OS X 10.9.4 to developers, just over a week after seeding the second OS X 10.9.4 beta and more than a month after the public release of OS X 10.9.3, which included enhanced support for 4K displays and syncing improvements.

The beta is available through the Software Update mechanism in the Mac App Store and should be in the Mac Dev Center shortly.

It remains unclear what improvements the 10.9.4 update will bring to Mavericks, but it is likely to include bug fixes and stability enhancements. Apple is asking developers to focus on Graphics Drivers, Bluetooth, Audio Drivers, Finder, App Store, and Safari.

Update: The new build is now available in the Mac Dev Center.

Related Forum: OS X Mavericks

Top Rated Comments

TestedLion Avatar
140 months ago
AND . . . that excuse, is lame. That is all people with your point of view typically say. We have a stable OS in Mavericks. Why not improve it rather than reinvent the wheel every time. A lot of people feel this way and a lot of people don't. Just because you thinks it "funny" doesn't mean you are right. I have come to expect more from Apple. I feel this should not be even at the developer stage yet. It will release in a few short months. What have they been doing all this time?
lol.

itt

people who have zero understanding of what dev. preview means.

these releases aren't meant to be stable system wide, necessarily. they're meant to preview, test, develop new technology implementations and/or "improvements" over older technologies.

if you didn't get your dev. previews via torrent sites, you'd actually understand what dev. preview means.

lol

you can keep your mavericks or whatever OS you bloody well want. it will eventually become deprecated. However, really, that won't necessarily matter depending on how satisfactory your OS + software solution is for the implementation of the desired end result your needs indicate.
Score: 9 Votes (Like | Disagree)
Steve121178 Avatar
140 months ago
Mavericks is dead. We want Yosemite!!! :D

I want stability. Something that's been lacking in OS X in recent years.

A new OS per year is ridiculous.
Score: 7 Votes (Like | Disagree)
bbfc Avatar
140 months ago
Then I would steer clear of 10.10. Seems the opposite of stability from what I can gather. Not sure how that classifies as progress, even at early beta stage...[COLOR="#808080"]

----------

IT'S A DEVELOPER PREVIEW. It's not even at beta stage yet! Jeez. People say the funniest things!
Score: 6 Votes (Like | Disagree)
Xenomorph Avatar
140 months ago
Mavericks is dead. We want Yosemite!!! :D

I'd like it if companies actually FIXED existing software instead of just rapidly releasing new software.

The existing stuff isn't fixed, and the new stuff introduces new bugs. Those new bugs won't get fixed, because they will just release a newer new product instead.

Bluetooth sometimes just "dies" on 10.9. Apple Mail has lots of issues in 10.9. Will these be fixed with 10.9.4? Who knows. Are they fixed in 10.10? Who knows.
Score: 5 Votes (Like | Disagree)
SVTmaniac Avatar
140 months ago
So having numerous pageouts and the system slow to a crawl with just one VM using 2 CPU cores and 1GB of RAM is not a sign of system instability? I have 8GB of RAM, it should equal a speedy system but for some reason due to the new memory allocation system it does not. I've tried using purge in terminal but it seems to have little effect.

Also, if I breath on my trackpad and causing a kernel panic isn't a sign of instability? It was inadvertent and I did it because it was resting on my chest while I was watching something yet it immediately caused my system to reboot. I've also had another KP which I made a thread about but no one responded to, no idea what caused it.



It takes 3 seconds to go full screen because of the HTML 5 animation in Chromium and Safari when double clicking a youtube video. My "old equus africanus asinus" machine is a mid 2012 MBP, it is more than capable of handling the animations but the delay inherent in the animation is causing the delay. Clearly, you have no idea what you are talking about.
Clearly my late 2013 15" rMBP has no issues doing what you say takes your machine 3 seconds to do. Obviously something isn't right with your machine or your setup, figure it out instead of blaming software that works fine on everyone else's machines. Would you like me to make a video of how fast it is? I'll be happy to do that for you.

And yes, I upgrade my MacBook every refresh cycle, so a two year old MacBook would be used as a doorstop in my house.
Score: 3 Votes (Like | Disagree)
WallToWallMacs Avatar
140 months ago
I want stability. Something that's been lacking in OS X in recent years.

What has been unstable about it? I've been running Mavericks as soon as it came out and not a single kernel panic, little to no problems with Safari and pretty much everything working as planned (I guess not using gmail also helps the situation).

A new OS per year is ridiculous.

Why is it ridiculous? it is nothing less than a rolling release with features being added only when mature and taking bite size changes rather than trying to cram a **** tonne of features into a single release then running around like headless chickens for the next 6 months fixing bugs.
Score: 3 Votes (Like | Disagree)

Popular Stories

iPhone 17 Pro Render Front Page Tech

iPhone 17 Pro Launching Later This Year With These 8 New Features

Tuesday March 4, 2025 3:15 pm PST by
While the iPhone 17 Pro and iPhone 17 Pro Max are not expected to launch until September, there are already plenty of rumors about the devices. iPhone 17 Pro's alleged design via Front Page Tech Below, we recap key changes rumored for the iPhone 17 Pro models as of March 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone...
Apple MacBook Air hero

Apple Announces New MacBook Air With M4 and 'Sky Blue' Color Option

Wednesday March 5, 2025 6:02 am PST by
Apple today announced refreshed 13- and 15-inch MacBook Air models, now featuring the M4 chip, an upgraded camera, and a new "Sky Blue" color option. "Sky Blue" is an all-new blue finish that joins Midnight, Starlight, and Silver. Apple describes it as a "beautiful, metallic light blue that creates a dynamic gradient when light reflects off of its surface." Space Gray is no longer available. ...
ipad 11 feature

Apple Unveils 11th-Gen iPad With A16 Chip and More Storage

Tuesday March 4, 2025 6:06 am PST by
Apple today announced the 11th-generation iPad, now featuring the A16 chip and more storage. The announcement came alongside the debut of the new iPad Air, which now features the M3 chip. From Apple's press release: The A16 chip provides a jump in performance for everyday tasks and experiences in iPadOS, while still providing all-day battery life. Compared to the previous generation, the...
M3 iPad Air

Apple Announces New iPad Air With M3 Chip, Updated Magic Keyboard

Tuesday March 4, 2025 6:04 am PST by
Apple today introduced new 11-inch and 13-inch iPad Air models with the M3 chip, along with an updated Magic Keyboard for the device. With the M3 chip, the new iPad Air should offer up to 20% faster performance compared to the previous-generation model with the M2 chip, which was released in May 2024. In addition, the M3 chip brings hardware-accelerated ray tracing to the iPad Air for the...
CarPlay Hero

iOS 18.4 Upgrades CarPlay in Two Ways

Tuesday March 4, 2025 8:39 am PST by
The upcoming iOS 18.4 update for the iPhone includes two smaller but meaningful improvements for Apple's in-car iPhone mirroring system CarPlay. First, CarPlay now shows a third row of icons, up from two rows previously. However, this change is only visible in vehicles with a larger center display. For example, a MacRumors Forums member noticed the change in a Toyota Tundra with a 14-inch...
macbook air blue image

New MacBook Air Coming This Week: What to Expect

Monday March 3, 2025 4:52 pm PST by
Apple CEO Tim Cook teased a new product announcement this week, sharing a short video that says "there's something in the Air." Based on the "Air" wording and the timing of the launch, it sounds like we're going to get new M4 MacBook Air models. Design Apple will continue to offer the MacBook Air in two sizes, including 13 inches and 15 inches. We are not expecting notable design updates,...
Apple MacBook Air hero

Apple Has Finally Solved One of the MacBook Air's Biggest Limitations

Wednesday March 5, 2025 11:29 am PST by
The new MacBook Air has a useful upgrade: it natively supports up to two external displays, in addition to the laptop's built-in display. In other words, the latest MacBook Air can be used with a pair of external displays without needing to keep the laptop's lid closed. Apple's tech specs for the new 13-inch and 15-inch MacBook Air:Simultaneously supports full native resolution on the...
cook tweet air upscale

Tim Cook Teases New Apple Product Announcement This Week: 'There's Something in the Air'

Monday March 3, 2025 8:02 am PST by
Apple CEO Tim Cook today teased a new product announcement coming "this week." "There's something in the air," the teaser says. This teaser likely refers to a new MacBook Air with the M4 chip, which is already expected to be announced as early as this week. Apple used the same "there's something in the air" slogan before it announced the original MacBook Air in 2008. Cook shared a si...
Generic iOS 19 Feature Mock Light

iOS 19 Rumored to Include These New Features for Your iPhone

Saturday March 1, 2025 11:00 am PST by
iOS 19 is still around three months away from being unveiled, but there are plenty of rumors about the upcoming update. Below, we recap iOS 19 rumors so far. Redesigned Camera App A leak earlier this year allegedly revealed a redesigned Camera app coming with iOS 19. On his YouTube channel Front Page Tech in January, Jon Prosser shared a video showing what the new Camera app will...