Apple Seeds OS X Mavericks 10.9.3 Build 13D55 to Developers - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Seeds OS X Mavericks 10.9.3 Build 13D55 to Developers

by

mavericks.pngApple today seeded build 13D55 of OS X 10.9.3 to developers, just over a week after releasing the eighth OS X beta, build 13D45a, and nearly two months after the first 10.9.3 beta.

The beta is available through the Software Update mechanism in the Mac App Store as well as through the Mac Dev Center.

Apple continues to ask developers to focus on Graphics Drivers, Audio, Mail, Contacts and Calendar sync over USB in iTunes, and Safari. As was discovered with the first beta, 10.9.3 adds new support for 4K displays, offering “Retina” resolutions that improve readability along with support for 60Hz output from the Retina MacBook Pro.

Top Rated Comments

v1597psh Avatar
159 months ago
Apple also added support in previous builds of 10.9.3 for Slow-motion playback in QuickTime and QuickLook for videos with high frame rate. For example captured by iPhone 5s. This feature hasn't been mentioned in the thread.MacRumors content image
Score: 13 Votes (Like | Disagree)
159 months ago
655MB. Just kidding - I have no clue how big it is - but I miss those meaningless size of the download posts.

Downloading now. Just kidding - I'm not downloading it right now - but I miss those meaningless downloading now posts.
Score: 12 Votes (Like | Disagree)
MrGimper Avatar
159 months ago
I've already explained why public beta testers can't see it yet.



You should read previous posts in this thread.



Do I have to start quoting myself?
No, but you could get off your soap box...
Score: 11 Votes (Like | Disagree)
Michael Goff Avatar
159 months ago
I've already explained why public beta testers can't see it yet.

You should read previous posts in this thread.

Do I have to start quoting myself?

I assume that, given the tone of this post, you must work for Apple? You must have some reason to expect everybody to just accept your word as the end-all-be-all.
Score: 11 Votes (Like | Disagree)
SvP Avatar
159 months ago
There is a good reason for the delay in releasing it to public beta testers (or for that matter not releasing it at all to them).

Lets say the build is a disaster and ruins your mac. Developers are probably better at fixing it than the general public. So it makes sense to give it to them first - just in case it is a disaster.

Nonsense
Score: 10 Votes (Like | Disagree)
laurihoefs Avatar
159 months ago
Apple has way too many $billions in their pocket to being crowd-sourcing (and without any sort of monetary reward, to boot) beta-testing of an operating system. Hire more people, Apple. Apple could literally afford to have two thousand guys in a huge auditorium doing nothing but beta-testing OS X all day. They wouldn't reguire a huge salary, either. I'm sure a number of computer geeks out there would be willing to do that for $10/hour. It would come with the prestige of being an Apple employee ;)

Companies don't (or at least shouldn't) do public betas to cut costs, they do them to improve the quality of their software. Public betas might not even be cheaper than hiring people directly to do the testing: the company has to go through more support requests, more bug reports, more bandwidth used to distribute the betas, etc.

What makes public betas so useful, is that it brings more environments, users, use cases, and combinations of hardware and software to the testing, than you could ever arrange in a controlled testing environment. For example, the with more beta testers the issues with WD SmartWare (https://www.macrumors.com/2013/11/26/western-digital-releases-new-hard-drive-software-after-mavericks-data-loss/) might have been spotted well before Mavericks was released. It's much easier to recognize patterns, if you have more bug reports to work with.
Score: 5 Votes (Like | Disagree)

Popular Stories

iCloud iPhone 17 Pro

iPhone Users Who Pay for iCloud Storage Get Two New Perks on iOS 27

Thursday July 2, 2026 6:10 am PDT by
If you pay for certain iCloud+ storage plans beyond the 5GB that Apple offers for free, you will receive two more perks on iOS 27 at no additional cost. A summary of the two new iCloud+ perks on iOS 27:Increased daily usage limits for some new Apple Intelligence features, including image generation in the revamped Image Playground app. HomeKit Secure Video cameras receive generated video...
Apple Event Logo

Apple Just Released a New Product

Thursday July 2, 2026 8:04 am PDT by
Apple's first product release of summer 2026 occurred this week, but do not get too excited, as it is merely the Beats Solo Buds in a new color. Beats Solo Buds are now offered in orange through Best Buy in the U.S., with availability set to expand to 7-Eleven stores in Japan on July 4. Apple already offered orange Solo Buds in India for free with the purchase of an iPhone 15 or iPhone 15 ...
iPhone 4 on Black Feature

Apple Facing One of Its Worst Leaks Since the iPhone 4

Thursday July 2, 2026 9:53 am PDT by
Apple supplier Tata Electronics recently suffered a cyberattack that resulted in thousands of confidential files being published on the dark web, and this reportedly included some photos and documents related to the upcoming iPhone 18 Pro. We have elected not to share any of the leaked photos in this story due to the illegal nature in which they were obtained, but they can easily be found...