safaripreviewiconApple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced four years ago in March 2016. Apple designed the ‌Safari Technology Preview‌ to test features that may be introduced into future release versions of Safari.

‌Safari Technology Preview‌ release 103 includes bug fixes and performance improvements for Web Inspector, Web API, CSS, Page Loading, Back-Forward Cache, and JavaScript.

The new ‌Safari Technology Preview‌ update is available for both macOS Mojave and MacOS Catalina, the newest version of the Mac operating system that was released in October 2019.

The ‌Safari Technology Preview‌ update is available through the Software Update mechanism in the Mac App Store to anyone who has downloaded the browser. Full release notes for the update are available on the Safari Technology Preview website.

Apple's aim with ‌Safari Technology Preview‌ is to gather feedback from developers and users on its browser development process. ‌Safari Technology Preview‌ can run side-by-side with the existing Safari browser and while designed for developers, it does not require a developer account to download.

Tag: Safari Technology Preview

Top Rated Comments

CarlJ Avatar
CarlJ
69 months ago

They can make all these upgrades but we will NEVER get 4K youtube :(
That's not a bug or a result of 4K being too far down the to-do list, or any such, rather, it's because Apple and Google have different viewpoints on encoding formats - IIRC, Google insists on VP9/AV1 for 4K, while Apple has thus far preferred to stick with the officially approved standards like H.264 and H.265 (which goes up to 8K).
Score: 3 Votes (Like | Disagree)
SuprUsrStan Avatar
SuprUsrStan
69 months ago
They can make all these upgrades but we will NEVER get 4K youtube :(
Score: 2 Votes (Like | Disagree)
TSE Avatar
TSE
69 months ago
Hopefully Safari becomes a little bit snappier.
Score: 2 Votes (Like | Disagree)
macbequick Avatar
macbequick
68 months ago
This is the laziest article series of this entire site. All you are doing is re-using the same text over and over again while updating a few sentences to represent the latest iteration of Safari Technology Preview. Kind of pointless. This is better served at Twitter rather than here. Maybe provide something more relevant or concrete. I too can sign-up to notifications from Apple when an update is released.
Score: 2 Votes (Like | Disagree)
ksec Avatar
ksec
69 months ago

I stumbled across this yesterday, it says 4k on my Mac mini 2011 with safari 12, unplayable even in 1080p like I'm used to.

So safari supports 4k in h265 codec or is it something else?
No, but great Finding!. ( Finally )

If you right click on it there is stats for nerds. Which said it is avc1.640033 (266) / mp4a.40.2 (140 )

Suggesting it is still the same H.264. But now you get 4K. It seems be some 3D Video with 360 degree viewing angle ( You can press the control under the BBC music logo to adjust viewing angle.

I wonder if this is only for MultiView Video or if 4K on H.264 is on Youtube's to do list.
Score: 1 Votes (Like | Disagree)
ahlsn Avatar
ahlsn
68 months ago

Is it possible to install safari preview and use the „final“ safari version that comes with MacOS or will it overwrite it when I install preview ?
Yep, it will show up as a separate app named Safari Tecnologiy Preview. I've using both right now.
Score: 1 Votes (Like | Disagree)
Read All Comments

Popular Stories

iPhone 16 Battery Life Feature

iOS 26's New Battery Life Mode Available Only on These iPhone Models

Saturday June 21, 2025 9:02 am PDT by
Last week, we reported that iOS 26 introduces an opt-in Adaptive Power Mode on the iPhone, alongside the existing Low Power Mode. Apple says that Adaptive Power Mode can make "small performance adjustments" when necessary to extend an iPhone's battery life, including slightly lowering the display brightness or allowing some activities to "take a little longer." The full description of...
Read Full Article • 60 comments
iPhone 17 Pro Blue Feature Tighter Crop

iPhone 17 Pro Launching in Three Months With These 12 New Features

Saturday June 21, 2025 2:45 pm PDT by
The iPhone 17 Pro and iPhone 17 Pro Max are around three months away, and there are plenty of rumors about the devices from credible sources. Below, we recap key changes rumored for the iPhone 17 Pro models as of June 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 X...
Read Full Article
All Screen iPhone 2027 Feature 1

iPhone Reportedly Moving to All-Screen Design in Two Stages

Sunday June 22, 2025 3:58 pm PDT by
Apple has long been working towards an iPhone with an all-screen design, and it might finally achieve the feat in a few more years from now. In his Power On newsletter today, Bloomberg's Mark Gurman said that Apple will shrink the size of the Dynamic Island on new iPhone models released next year. A year after that, he expects Apple to release a redesigned 20th-anniversary iPhone model....
Read Full Article • 80 comments
iPhone 17 Pro Blue Feature Tighter Crop

iPhone 17 Pro's Alleged Vapor Chamber Cooling System Partly Revealed

Sunday June 22, 2025 6:37 am PDT by
Apple's upcoming iPhone 17 Pro and iPhone 17 Pro Max models are rumored to be equipped with a vapor chamber cooling system, and a leaker known as Majin Bu today shared a photo of an alleged copper thermal plate for the system. Many high-end Android smartphones like Samsung's Galaxy S25 Ultra are equipped with a vapor chamber cooling system, which can manage heat dissipation inside the...
Read Full Article • 75 comments
Wi Fi WiFi General Feature

iOS 26 Adding Two New Wi-Fi Features, Allows AirDrop and AirPlay Alternatives

Saturday June 21, 2025 7:02 am PDT by
iOS 26 is gaining two new Wi-Fi features, including Captive Assist and Wi-Fi Aware. MacRumors contributor Aaron Perris discovered a reference to Captive Assist within the code for the first iOS 26 developer beta, but Apple has yet to enable the feature. It should be available by the time the software update is released later this year. In his Power On newsletter last month, Bloomberg's...
Read Full Article • 39 comments
iOS 26 on Three iPhones

iOS 26 Includes These Five Smaller Features You Might Have Missed

Saturday June 21, 2025 11:18 am PDT by
While the dust is beginning to settle on the first iOS 26 beta, we continue to take a closer look at new features coming with the update. Below, we recap five smaller changes that you might have missed. Emoji Game Apple News+ subscribers in the U.S. and Canada can play a new Emoji Game, which tasks players with completing words and phrases with emoji. This is the fifth game that is...
Read Full Article • 34 comments
iPhone 17 Pro Blue Feature Tighter Crop

iPhone 17 Pro Launching in Three Months With These 12 New Features

Saturday June 14, 2025 5:45 pm PDT by
The iPhone 17 Pro and iPhone 17 Pro Max are three months away, and there are plenty of rumors about the devices. Below, we recap key changes rumored for the iPhone 17 Pro models as of June 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 X through iPhone 14 Pro have a...
Read Full Article • 218 comments
apple wallet drivers license feature iPhone 15 pro

iPhone Driver's Licenses: These 17 U.S. States Offer Them or Will Later

Thursday June 19, 2025 11:28 am PDT by
In select U.S. states, residents can add their driver's license or state ID to the Wallet app on the iPhone and Apple Watch, providing a convenient and contactless way to display proof of identity or age at select airports and businesses, and in select apps. Unfortunately, this feature continues to roll out very slowly since it was announced in 2021, with only nine U.S. states and Puerto...
Read Full Article • 102 comments
ios 26 control center b2

iOS 26 Beta 2 Fixes Control Center Design

Monday June 23, 2025 10:58 am PDT by
With the second beta of iOS 26 that Apple provided to developers today, Apple addressed one of the major complaints that people have had with Liquid Glass. iOS 26 beta 1 on left, iOS 26 beta 2 on right The Control Center buttons are now slightly more opaque, making it easier to see the different control options even on a multicolored background. The new, more opaque look is apparent with the ...
Read Full Article • 98 comments