Apple Seeds OS X Mavericks 10.9.3 Build 13D45a to Developers - MacRumors
Skip to Content

Apple Seeds OS X Mavericks 10.9.3 Build 13D45a to Developers

by

mavericks.pngApple today seeded build 13D45a of OS X 10.9.3 to developers, just under a week after releasing the seventh OS X beta, build 13D43, and over a month 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

163 months ago
Has anyone really ever noticed much difference with any of these betas? OSX 10.9 just runs pretty **** and sluggish no matter for me. A few random bugs come up or disappear with the betas but nothing major seems to be fixed or worked on. The fact that it's the same non descriptive list of "changes to" they give every time rather than specific changelogs gives me little hope to that much is actually changing, and that most of it is very very specific problems only few experience, or that is related to other big brands such as HP, DELL etc that they are fiddling with.
1) You shouldn't be noticing "big" or "major" changes in point fixes. These are not a move from, say, 10.8 to 10.9. A version release is when you, the end user, should see "big" changes.

2) If your Mavericks system is slow/sluggish - you should consider backing up your data via timemachine, do a fresh install, then import your data. Unless you have an ancient system that has a small amount of RAM, or possibly a failing HDD/SSD (and/or all three or some combination), or have borked your system folder in some way...Mavericks should be running like a champ for you. Mavericks, on my 4670K system, is ridiculously snappy...much more so than Windows which I, sadly, sometimes require.
Score: 5 Votes (Like | Disagree)
DavidBlack Avatar
163 months ago
Link, please :D :apple:

You can now get beta updates without being a Apple Developer. Visit this for more info: https://forums.macrumors.com/showthread.php?t=1727968
I guess it's your lucky day lol.
Score: 2 Votes (Like | Disagree)
5aga Avatar
163 months ago
Apple Opens OS X Beta Testing To All Users With New Seed Program

http://techcrunch.com/2014/04/22/apple-opens-os-x-beta-program-to-all-users-with-new-seed-program/

be advised that there are certain risks that accompany beta software
Score: 2 Votes (Like | Disagree)
justperry Avatar
163 months ago
---
Hahaha newbie only here but not elsewhere big up your mindset and respect people !

You are not obliged to trust it and try it neither, so love it or leave it peace of mind pls :)

This app helps to check the changes between installed build and the next one by date. That's it :)

it's easy to install i guess, i had no prob with !

Didn't really want to 'hurt' anybody, it's just not good advise to download a zipped file from an 'unknown' person.
You could be the nicest guy in the world, fact is, we don't know you, if you were a long time member, posting a lot we know you and trust you, since you are not I(we) won't download anything from you.
But, I do know OS X is fairly safe, no (known) viruses out in the open, I am not paranoid about it, but we just don't know you.
;):)
Score: 2 Votes (Like | Disagree)
DavidBlack Avatar
163 months ago
Link, please :D :apple:

No one here can give you a link, it's against the rules. Google search is your best friend :rolleyes:;)
Score: 2 Votes (Like | Disagree)
Traverse Avatar
163 months ago
461mb on 2011 MBP

Just found this, downloading now.. 461 MB

Out of genuine curiosity, why do people post the size when apple releases an update? The bigger the better? :confused:
Score: 2 Votes (Like | Disagree)

Popular Stories

Apple TV 4K HomeView HomePod Mini tweaked

New Apple TV 4K, HomeView, and HomePod Mini: 16 Details Just Leaked

Sunday October 11, 2026 12:56 pm PDT by
Just two days before Apple's "Welcome home" experience in New York, Bloomberg's Mark Gurman has leaked several details about the new products set to be unveiled, including an all-new smart home hub, a HomePod mini 2, and a new Apple TV 4K. Here is an all-in-one summary of the details shared by Gurman:Apple's home hub with a touch-enabled display will be named HomeView, seemingly confirming a ...
Apple HomeView lineup feature1

Apple Announces 'HomeView' Smart Home Hub

Tuesday October 13, 2026 6:00 am PDT by
Apple today announced the "HomeView," an all-new kind of smart home hub featuring a 7-inch Liquid Retina display and Siri AI. Apple's senior vice president of Worldwide Marketing Greg Joswiak said: Apple HomeView is designed to be shared by everyone in the home yet feel completely personal to each user. It recognizes your face to shift from a household screen to your own experience,...
Apple TV 4K 4th Generation feature4

New Apple TV 4K Announced With A19 Chip, Updated Siri Remote, More

Tuesday October 13, 2026 6:08 am PDT by
Apple today announced the fourth-generation Apple TV 4K, with key features including an A19 chip, Siri AI support, an updated Siri Remote that has Find My support with Precision Finding, built in far-field microphones, support for surround sound with four HomePods in front and rear pairs, and more. The A19 chip in the new Apple TV 4K delivers up to 50% faster CPU performance and up to twice...
Latest Stories
AppleCare+ Launched 15 Years Ago Today
AppleCare+ Launched 15 Years Ago Today
1 minute ago
Apple Reportedly Planning Large iPhone 18 Production Run
Apple Reportedly Planning Large iPhone 18 Production Run
6 minutes ago
Apple Says These Products Are Now Obsolete
Apple Says These Products Are Now Obsolete
19 minutes ago
First Pre-Order Discounts Now Available for HomeView
First Pre-Order Discounts Now Available for HomeView
1 hour ago
Apple Launched iPhone 4S With Siri 15 Years Ago Today
Apple Launched iPhone 4S With Siri 15 Years Ago Today
1 hour ago
Apple HomeView Includes Temperature and Humidity Sensors
Apple HomeView Includes Temperature and Humidity Sensors
1 hour ago
HomePod Mini vs. HomePod Mini 2 Buyer's Guide: All Differences Compared
HomePod Mini vs. HomePod Mini 2 Buyer's Guide: All Differences Compared
2 hours ago
Apple Watch Sleep Apnea Notifications Launch in China
Apple Watch Sleep Apnea Notifications Launch in China
3 hours ago
HomeView's Faces Include Snoopy, Photos, and Interactive Artwork
HomeView's Faces Include Snoopy, Photos, and Interactive Artwork
3 hours ago
Apple's HomeView Repair Fees Revealed
Apple's HomeView Repair Fees Revealed
13 hours ago
Everything Apple Still Has Coming in October
Everything Apple Still Has Coming in October
14 hours ago
Welcome Home: Everything Apple Announced on October 13
Welcome Home: Everything Apple Announced on October 13
15 hours ago
Will the Full-Sized HomePod Get Siri AI? Apple's Website Offers a Clue
Will the Full-Sized HomePod Get Siri AI? Apple's Website Offers a Clue
15 hours ago
Apple Releases Third Public Betas of iOS 27.2 and macOS Golden Gate 27.2
Apple Releases Third Public Betas of iOS 27.2 and macOS Golden Gate 27.2
16 hours ago
iOS 27.2 Adds New Apple Music Icon
iOS 27.2 Adds New Apple Music Icon
16 hours ago
HomePod Mini 2 Works as Default Speaker With Select Macs
HomePod Mini 2 Works as Default Speaker With Select Macs
16 hours ago
Elevation Lab Pulls AirTag Silencer After Stalking Concerns
Elevation Lab Pulls AirTag Silencer After Stalking Concerns
17 hours ago
iOS 27.2 Beta 4 Removes New Health App
iOS 27.2 Beta 4 Removes New Health App
17 hours ago
iPhone Duo Will Have Day-One iOS 27.1 Update
iPhone Duo Will Have Day-One iOS 27.1 Update
18 hours ago
Where to Pre-Order Apple's New HomeView, HomePod Mini 2, and Apple TV 4K
Where to Pre-Order Apple's New HomeView, HomePod Mini 2, and Apple TV 4K
18 hours ago
Apple Releases New AirPods Beta Firmware
Apple Releases New AirPods Beta Firmware
19 hours ago
Apple Seeds Fourth macOS Golden Gate 27.2 Beta to Developers
Apple Seeds Fourth macOS Golden Gate 27.2 Beta to Developers
19 hours ago
Apple Releases Fourth iOS 27.2 Beta
Apple Releases Fourth iOS 27.2 Beta
19 hours ago
Apple Releases Fourth watchOS 27.2 and visionOS 27.2 Betas
Apple Releases Fourth watchOS 27.2 and visionOS 27.2 Betas
19 hours ago
Anker and Jackery Offer Prime Day Encore Discounts on Power Stations
Anker and Jackery Offer Prime Day Encore Discounts on Power Stations
20 hours ago
New Apple TV 4K and Siri Remote Have These 14 New Features
New Apple TV 4K and Siri Remote Have These 14 New Features
20 hours ago
HomeView Runs Third-Party Apps From Your iPhone or iPad
HomeView Runs Third-Party Apps From Your iPhone or iPad
21 hours ago
RIP, homeOS
RIP, homeOS
21 hours ago
New Apple TV 4K Supports Surround Sound via Four HomePods
New Apple TV 4K Supports Surround Sound via Four HomePods
21 hours ago
Apple Says HomePod Mini 2 Won't Support Siri AI Right Away
Apple Says HomePod Mini 2 Won't Support Siri AI Right Away
22 hours ago