Apple Seeds OS X Mavericks 10.9.5 Build 13F24 to Developers - MacRumors
Skip to Content

Apple Seeds OS X Mavericks 10.9.5 Build 13F24 to Developers

by

Apple today seeded Mavericks 10.9.5 build 13F24 to developers, just over a week after seeding the fourth OS X 10.9.5 beta, build 13F18, and more than a month after releasing OS X 10.9.4 to the public.

The beta is available through the Software Update mechanism in the Mac App Store and through the Mac Developer Center.

build13f24
It is unclear what improvements the 10.9.5 update will bring to Mavericks, but it is likely to include bug fixes and stability enhancements. Apple is asking developers to focus on USB, USB Smart Cards, Graphics, Safari, Thunderbolt, and Gatekeeper.

Along with working on improvements to Mavericks, Apple is also beta testing OS X Yosemite, which is due to be released in the fall. The last Mavericks update, 10.9.4, added several Wi-Fi fixes and improved wake from sleep reliability.

Top Rated Comments

crjackson2134 Avatar
crjackson2134
156 months ago
I'm really looking forward release. I just hope it will fix USB "External Disk was not Ejected Properly" error.
Score: 5 Votes (Like | Disagree)
groovyd Avatar
groovyd
156 months ago
must be depressing being on the team of elves who fix last year's broken gifts.
Score: 4 Votes (Like | Disagree)
Detektiv-Pinky Avatar
Detektiv-Pinky
156 months ago
You do now, but not in about two months.

<snip>

Anyone still on the BEST Mac OS X Snow Leopard..?:rolleyes:

I just upgraded from Snow Leopards a few months ago. I had no use of any of the features of Mavericks. As it stands I spend several days disabling the most annoying things like AutoSave, Versions and Message Center.

It was the simple fact that Apple stopped to issue security updates for the OS that forced me to switch. I am not looking forward to switch OS again soon...
Score: 4 Votes (Like | Disagree)
E
Eithanius
156 months ago
i'm dreadfully looking forward to this update, as well. i hope "stability fixes" include NVRM/Read Error/GPUPanic Kernel Panic issues associated with Mid-2010 MBP's w/ the Nvidia GT330m.

I will be holding my breath.

Nope... that is hardware issue...
Score: 4 Votes (Like | Disagree)
crjackson2134 Avatar
crjackson2134
156 months ago
Nope, that requires the user (you) to stop pulling the plug on the External Disk without first unmounting the volume from the file system. :p
You need to do a little more research. Many! People are having this problem. Also, don't Assume so much. My drives are NEVER unplugged.

It's a common problem.
Score: 3 Votes (Like | Disagree)
OldMacUser Avatar
OldMacUser
156 months ago
Nope, that requires the user (you) to stop pulling the plug on the External Disk without first unmounting the volume from the file system. :p

I have this error occurring repeatedly with a USB3 disk enclosure and it is not because of "pulling the plug" - the drive will randomly disconnect when attempting to write data to the disk.

Randomly in the sense that it can write 2GB of data, then disconnect, OR on another attempt, it will write about 500MB of data then disconnect.
Score: 3 Votes (Like | Disagree)
Read All Comments

Popular Stories

Four iPhone 18 Pro Colors Mock Feature

iPhone 18 Pro and iPhone Ultra: Pre-Orders and Release Date

Thursday July 30, 2026 6:12 am PDT by
Apple has yet to reveal when the iPhone 18 Pro and iPhone Ultra will be announced and released, but the dates usually follow a familiar pattern. Labor Day is September 7 this year. The last time the holiday fell on that day was in 2020, but the iPhone event that year was delayed until October due to the COVID-19 pandemic. So, the last time Labor Day was on September 7 in a normal year was in ...
Read Full Article
macbook ultra

MacBook Ultra's New Design Won't Stay Exclusive for Long

Thursday July 30, 2026 6:00 pm PDT by
The touchscreen and the OLED panel have dominated discussion about Apple's next high-end laptop, but the redesign wrapped around them may prove to be an equally consequential change, largely because it is not expected to stay unique to the machine for long. Bloomberg's Mark Gurman last week laid out Apple's plan to refresh every Mac it sells over the next two years. In the report, he...
Read Full Article • 113 comments
Apple Event Logo

Apple Working on All-New Operating System

Wednesday July 29, 2026 11:39 am PDT by
Apple is developing an all-new operating system that is essentially a mix of tvOS, watchOS, and iOS, according to Bloomberg's Mark Gurman. In a report this week, he said the operating system will feature a grid of icons, widgets, and apps, along with customizable clock faces. The new software platform is intended for Apple's long-rumored smart home hub. With built-in facial recognition,...
Read Full Article