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
139 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
139 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
139 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)
Eithanius Avatar
139 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
139 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
139 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)

Popular Stories

AirPods Pro 3 Mock Feature

AirPods Pro 3 Just Months Away – Here's What We Know

Friday April 18, 2025 5:16 am PDT by
Despite being more than two years old, Apple's AirPods Pro 2 still dominate the premium wireless‑earbud space, thanks to a potent mix of top‑tier audio, class‑leading noise cancellation, and Apple's habit of delivering major new features through software updates. With AirPods Pro 3 widely expected to arrive in 2025, prospective buyers now face a familiar dilemma: snap up the proven...
iphone 17 air dummy unbox therapy

iPhone 17 Air's Extreme Thinness Demoed in New Video

Tuesday April 22, 2025 10:22 am PDT by
Apple plans to release an all-new super thin iPhone this year, debuting it alongside the iPhone 17, iPhone 17 Pro, and iPhone 17 Pro Max. We've seen pictures of dummy models, cases, and renders with the design, but Lewis Hilsenteger of Unbox Therapy today showed off newer dummy models that give us a better idea of just how thin the "iPhone 17 Air" will be. The iPhone 17 Air is expected to be ...
iphone 17 dummies sonny dickson

iPhone 17 Air Almost as Thin as Its Buttons, New Images Show

Thursday April 24, 2025 2:14 am PDT by
If you missed the video showing dummy models of Apple's all-new super thin iPhone 17 Air that's expected later this year, Sonny Dickson this morning shared some further images of the device in close alignment with the other dummy models in the iPhone 17 lineup, indicating just how thin it is likely to be in comparison. The iPhone 17 Air is expected to be around 5.5mm thick – with a thicker ...
ipad air windows 11 arm

M2 iPad Air Runs Windows 11 ARM via Emulation, Thanks to EU Rules

Tuesday April 22, 2025 5:01 am PDT by
A developer has demonstrated Windows 11 ARM running on an M2 iPad Air using emulation, which has become much easier since the EU's Digital Markets Act (DMA) regulations came into effect. As spotted by Windows Latest, NTDev shared an instance of the emulation on social media and posted a video on YouTube (embedded below) demonstrating it in action. The achievement relies on new EU regulatory...
iphone 16 pro models 1

17 Reasons to Wait for the iPhone 17

Thursday April 17, 2025 4:12 am PDT by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models simultaneously, which is why we often get rumored features months ahead of launch. The iPhone 17 series is no different, and we already have a good idea of what to expect from Apple's 2025 smartphone lineup. If you skipped the iPhone...
iOS 18

iOS 18.5 Includes Only a Few Changes So Far

Monday April 21, 2025 11:00 am PDT by
Apple seeded the third beta of iOS 18.5 to developers today, and so far the software update includes only a few minor changes. The changes are in the Mail and Settings apps. In the Mail app, you can now easily turn off contact photos directly within the app, by tapping on the circle with three dots in the top-right corner. In the Settings app, AppleCare+ coverage information is more...
iPhone 17 Pro Blue Feature Tighter Crop

iPhone 17 Pro Launching Later This Year With These 13 New Features

Wednesday April 23, 2025 8:31 am PDT 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. Below, we recap key changes rumored for the iPhone 17 Pro models as of April 2025: Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone ...