mavericks.pngApple today seeded build 13D33 of OS X 10.9.3 to developers, just under a week after releasing the fourth OS X beta, build 13D28, and 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 and Audio, 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

Orlandoech Avatar
155 months ago
I still don't get the concept behind retina. If it has to be always scaled down to lower resolutions, then how does it becomes different from a computer that runs the same resolutions (the resolution that the retina is scaled down to) natively ?

Go retina for a month then go back and you'll see.
Score: 8 Votes (Like | Disagree)
djtech42 Avatar
155 months ago
I still don't get the concept behind retina. If it has to be always scaled down to lower resolutions, then how does it becomes different from a computer that runs the same resolutions (the resolution that the retina is scaled down to) natively ?

4x the amount of pixels fill up that resolution, so the display is very clear.
Score: 8 Votes (Like | Disagree)
155 months ago
10.10 will be out by the time 10.9.3 is released.

10.10 won't be out until later in the fall. The first seed will likely be available on June 2nd, when the keynote demo is done.


I still don't get the concept behind retina. If it has to be always scaled down to lower resolutions, then how does it becomes different from a computer that runs the same resolutions (the resolution that the retina is scaled down to) natively ?

You need to look at the pixel density as the second major factor, not the resolution by itself. It's showing 4 pixels of data in the same area of two pixels on a non-retina display.

Here's what it looks like:



See how sharp the text is on the bottom and how the icon is more detailed. It is because it is showing twice as more details in the same area.

It has to scale down to match the same usable space as the previous screen. If it didn't scale down, it would show the pixels as two smaller pixels, meaning everything will be twice as small than before.
Score: 4 Votes (Like | Disagree)
155 months ago
If you haven't, I'd suggest you report the bug to Apple directly (http://www.apple.com/feedback/macosx.html)

That link is only for the public.

These betas are only for developers.

So if you have the beta installed and found a bug assuming you are a developer, you should use apple's bug reporter at this link instead: https://bugreport.apple.com/ to file a proper bug report.

Login with your developer id.
Score: 3 Votes (Like | Disagree)
r.harris1 Avatar
155 months ago
Still no fix for the Auto-detect language check spelling bug. :( Apple broke it in Mavericks and never fixed it...

The bug is if Auto-detect language is on, it does only underline in red only half of the errors on a text. If a word that I know if not correctly written but not underlined in red and I right click on it, it does show me all the alternative words, like it it was underlined. If I only select 1 language in the spelling correction, then all the miswritten words are properly underlined. Since I do write texts in 3 languages, I cannot only select one language for the spelling check.

Please fix it!

If you haven't, I'd suggest you report the bug to Apple directly (http://www.apple.com/feedback/macosx.html) since it's very unlikely their bug list and their priorities come from MacRumors. Note that doing so doesn't mean that it gets fixed any time soon (if ever), as bugs get prioritized and slotted into releases based on resources (people) and severity, but unless it gets reported to them, it doesn't get on their radar.
Score: 2 Votes (Like | Disagree)
155 months ago
I still don't get the concept behind retina. If it has to be always scaled down to lower resolutions, then how does it becomes different from a computer that runs the same resolutions (the resolution that the retina is scaled down to) natively ?
Score: 2 Votes (Like | Disagree)

Popular Stories

Apple Announces Special Event in New York Feature

Apple Announces Special Event in New York, London, and Shanghai on March 4

Monday February 16, 2026 6:05 am PST by
Apple today announced a "special Apple Experience" in New York, London, and Shanghai, taking place on March 4, 2026 at 9:00am ET. Apple invited select members of the media to the event in three major cities around the world. It is simply described as a "special Apple Experience," and there is no further information about what it may entail. The invitation features a 3D Apple logo design...
M3 iPad Air

Apple's Next Two Products Are Coming Soon

Thursday February 12, 2026 11:17 am PST by
Apple plans to release an iPhone 17e and an iPad Air with an M4 chip "in the coming weeks," according to the latest word from Bloomberg's Mark Gurman. "Apple retail employees say that inventory of the iPhone 16e has basically dried out and the iPad Air is seeing shortages as well," said Gurman. "I've been expecting new versions of both (iPhone 17e and M4 iPad Air) in the coming weeks."...
Apple Sales Coach App

Apple Launching New 'Sales Coach' App

Friday February 13, 2026 2:01 pm PST by
Apple plans to launch a rebranded "Sales Coach" app on the iPhone and iPad later this month, according to a source familiar with the matter. "Sales Coach" will arrive as an update to Apple's existing "SEED" app, and it will continue to provide sales tips and training resources to Apple Store and Apple Authorized Reseller employees around the world. For example, there are articles and videos...
Coffee Burgundy and Purple iPhone 18 Pro Mock

Five iPhone 18 Pro Features Revealed in New Report

Friday February 13, 2026 8:43 am PST by
While the iPhone 18 Pro and iPhone 18 Pro Max are still seven months away, an analyst has revealed five new features the devices will allegedly have. Rumored color options for the iPhone 18 Pro models In a research note with investment firm GF Securities on Thursday, analyst Jeff Pu outlined the following upgrades for the iPhone 18 Pro models: Smaller Dynamic Island: It has been rumored...
iOS 26 Home Feature

Three New Apple Home Products Rumored for 2026

Friday February 13, 2026 4:18 pm PST by
Apple has a long list of new products rumored for 2026, including a series of home products that will see the company establishing more of a presence in the smart home space. Robots are on the horizon for 2027, but the 2026 releases will be a little tamer. HomePod mini We're expecting a new HomePod mini 2 to launch at any time. Apple isn't going to update the device's design, but we could...