Apple Seeds OS X Mavericks 10.9.4 Build 13E19 to Developers - MacRumors
Skip to Content

Apple Seeds OS X Mavericks 10.9.4 Build 13E19 to Developers

by

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

161 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
161 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)
161 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
161 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)
160 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)
161 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

iOS 26 Battery Glass Feature

Three Years of 80% Charge Limits on iPhone: The Results

Tuesday October 6, 2026 12:59 pm PDT by
Since 2023, Apple's newer iPhones have had an 80 percent charge limit for those who want to extend battery lifespan. Charging to 80 percent instead of 100 percent is supposed to put less stress on the battery, improving longevity. For the last three years, I've used that setting on my iPhone. I started with the iPhone 15 Pro Max, then did the iPhone 16 Pro Max, and most recently, the iPhone...
MagSafe 3 Cable Midnight Feature

Apple Releases MagSafe 3 Charging Cable Firmware Update

Monday October 5, 2026 5:59 am PDT by
For the first time since February 2023, Apple has released a firmware update for the MagSafe 3 charging cable for the MacBook Pro and MacBook Air. Specifically, Apple last week released firmware version 3.2.0 for the USB-C to MagSafe 3 Cable. The previous firmware version for the cable was 3.1.12. It is unclear what is included in the latest firmware, as Apple does not publish release...
Prime Big Deal Days 25 Red and Green

Amazon Launches Prime Day Discounts on AirPods, iPad, MacBook Air, and More

Sunday October 4, 2026 9:15 am PDT by
Earlier this week, we began tracking early Prime Day deals on Apple-related accessories, and now Amazon has introduced major early deals on Apple products as well. This includes AirPods, iPads, MacBooks, and more, all available at some of the lowest prices of the year so far. Note: MacRumors is an affiliate partner with Amazon. When you click a link and make a purchase, we may receive a small...
Latest Stories
Apple Watch Ultra 3 and Ultra 4 See Record Discounts During Prime Day
Apple Watch Ultra 3 and Ultra 4 See Record Discounts During Prime Day
19 minutes ago
Apple Drops Intel Macs From Magic Mouse/Trackpad Compatibility Lists
Apple Drops Intel Macs From Magic Mouse/Trackpad Compatibility Lists
29 minutes ago
Apple Reportedly Waiting on Samsung for Ultimate Bezel-Free iPhone Display
Apple Reportedly Waiting on Samsung for Ultimate Bezel-Free iPhone Display
55 minutes ago
Apple's Own Home Security Camera Still Coming Next Year
Apple's Own Home Security Camera Still Coming Next Year
3 hours ago
Unfolded iPhone Duo Lets You Preview Documents in a Two-Page Layout
Unfolded iPhone Duo Lets You Preview Documents in a Two-Page Layout
3 hours ago
Formula 1 Coverage on Apple TV to Get Dolby Atmos Later This Month
Formula 1 Coverage on Apple TV to Get Dolby Atmos Later This Month
5 hours ago
LG Making Doorbell, Lock, and Cameras for Apple's Home Hub
LG Making Doorbell, Lock, and Cameras for Apple's Home Hub
15 hours ago
Apple to Report Q4 2026 Earnings on November 2
Apple to Report Q4 2026 Earnings on November 2
16 hours ago
Three Years of 80% Charge Limits on iPhone: The Results
Three Years of 80% Charge Limits on iPhone: The Results
17 hours ago
macOS 27.2 Further Hints at MacBook With Touch-Enabled OLED Display
macOS 27.2 Further Hints at MacBook With Touch-Enabled OLED Display
19 hours ago
The 15 Best Apple Deals Under $200 for Prime Day
The 15 Best Apple Deals Under $200 for Prime Day
19 hours ago
AirPods Pro 3 and AirPods Max 2 Get Big Price Drops for Prime Day
AirPods Pro 3 and AirPods Max 2 Get Big Price Drops for Prime Day
20 hours ago
Apple Releases Second Public Betas of iOS 27.2 and macOS Golden Gate 27.2
Apple Releases Second Public Betas of iOS 27.2 and macOS Golden Gate 27.2
20 hours ago
'Crossy Road Rush' Launching Exclusively on Apple Arcade in November
'Crossy Road Rush' Launching Exclusively on Apple Arcade in November
21 hours ago
Apple Watch Series 9 vs. Series 12 Buyer's Guide: Is It Worth Upgrading?
Apple Watch Series 9 vs. Series 12 Buyer's Guide: Is It Worth Upgrading?
21 hours ago
Prime Day Savings: TVs, Headphones, Chargers, and Other Tech Accessories
Prime Day Savings: TVs, Headphones, Chargers, and Other Tech Accessories
22 hours ago
Apple TV 4K Rumored to Support Four HomePods for Surround Sound
Apple TV 4K Rumored to Support Four HomePods for Surround Sound
23 hours ago
iPhone 18 Pro and Duo Were Once Planned With 16GB RAM, Leaker Says
iPhone 18 Pro and Duo Were Once Planned With 16GB RAM, Leaker Says
23 hours ago
Apple's Entire Mac Lineup Gets Massive Discounts for Prime Day
Apple's Entire Mac Lineup Gets Massive Discounts for Prime Day
23 hours ago
Prime Day iPad Deals Include Low Prices on iPad Air, iPad Mini, and More
Prime Day iPad Deals Include Low Prices on iPad Air, iPad Mini, and More
1 day ago
Apple's $634 Million Apple Watch Patent Bill Just Got Even Bigger
Apple's $634 Million Apple Watch Patent Bill Just Got Even Bigger
1 day ago
Amazon Prime Big Deal Days Offers Major Discounts on AirPods, iPads, and Much More
Amazon Prime Big Deal Days Offers Major Discounts on AirPods, iPads, and Much More
37 minutes ago
Microsoft OneDrive to Drop Support for These iPhone Models
Microsoft OneDrive to Drop Support for These iPhone Models
1 day ago
HomePod Mini Waits Reach Eight Weeks Ahead of Rumored Refresh
HomePod Mini Waits Reach Eight Weeks Ahead of Rumored Refresh
1 day ago
Apple Music Is Getting a New Logo
Apple Music Is Getting a New Logo
1 day ago
Apple Quietly Boosts Email Feature for iCloud+ Subscribers
Apple Quietly Boosts Email Feature for iCloud+ Subscribers
7 hours ago
iOS 27.2 May Let You Hide Specific Suggested Actions in Messages
iOS 27.2 May Let You Hide Specific Suggested Actions in Messages
1 day ago
Sources: Apple Planning Two Sets of Product Launches in October
Sources: Apple Planning Two Sets of Product Launches in October
1 day ago
Apple Announces iPhone Duo Apps Can Now Be Submitted to App Store
Apple Announces iPhone Duo Apps Can Now Be Submitted to App Store
1 day ago
macOS 27.2 Adds Touch Gestures Ahead of MacBook Ultra
macOS 27.2 Adds Touch Gestures Ahead of MacBook Ultra
2 days ago