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
149 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
149 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)
MikhailT Avatar
149 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)
tywebb13 Avatar
149 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
149 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)
MacMan988 Avatar
149 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

iPhone 17 Pro Dark Blue and Orange

iPhone 17 Release Date, Pre-Orders, and What to Expect

Thursday August 28, 2025 4:08 am PDT by
An iPhone 17 announcement is a dead cert for September 2025 – Apple has already sent out invites for an "Awe dropping" event on Tuesday, September 9 at the Apple Park campus in Cupertino, California. The timing follows Apple's trend of introducing new iPhone models annually in the fall. At the event, Apple is expected to unveil its new-generation iPhone 17, an all-new ultra-thin iPhone 17...
iPhone 17 Pro Iridescent Feature 2

iPhone 17 Pro Clear Case Leak Reveals Three Key Changes

Sunday August 31, 2025 1:26 pm PDT by
Apple is expected to unveil the iPhone 17 series on Tuesday, September 9, and last-minute rumors about the devices continue to surface. The latest info comes from a leaker known as Majin Bu, who has shared alleged images of Apple's Clear Case for the iPhone 17 Pro and Pro Max, or at least replicas. Image Credit: @MajinBuOfficial The images show three alleged changes compared to Apple's iP...
xiaomi apple ad india

Apple and Samsung Push Back Against Xiaomi's Bold India Ads

Friday August 29, 2025 4:54 am PDT by
Apple and Samsung have reportedly issued cease-and-desist notices to Xiaomi in India for an ad campaign that directly compares the rivals' devices to Xiaomi's products. The two companies have threatened the Chinese vendor with legal action, calling the ads "disparaging." Ads have appeared in local print media and on social media that take pot shots at the competitors' premium offerings. One...
iphone 16 pro ghost hand

iPhone 17 Pro: 5 Reasons Not to Upgrade This Year

Monday September 1, 2025 4:35 am PDT by
Apple will launch its new iPhone 17 series this month, and the iPhone 17 Pro models are expected to get a new design for the rear casing and the camera area. But more significant changes to the lineup are not expected until next year, when the iPhone 18 models arrive. If you're thinking of trading in your iPhone for this year's latest, consider the following features rumored to be coming to...
iOS 18 on iPhone Arrow Down

Apple Preparing iOS 18.7 for iPhones as iOS 26 Release Date Nears

Sunday August 31, 2025 4:35 pm PDT by
Apple is preparing to release iOS 18.7 for compatible iPhone models, according to evidence of the update in the MacRumors visitor logs. We expect iOS 18.7 to be released in September, alongside iOS 26. The update will likely include fixes for security vulnerabilities, but little else. iOS 18.7 will be one of the final updates ever released for the iPhone XS, iPhone XS Max, and iPhone XR,...