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

Safari Technology Preview release 39 includes fixes and improvements for Beacon API, Directory Upload, Fetch API, Input Events, JavaScript, WebAssembly, WebRTC, Web Inspector, and Media. With Safari 11 now available to developers through the macOS High Sierra beta, Apple is providing two versions of Safari Technology Preview, one for macOS Sierra users and one for those using macOS High Sierra.

Safari Technology Preview users might want to hold off on downloading Safari Technology Preview 39 as the new version appears to be crashing at launch and not working properly.

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.

Update: The Safari Technology Preview 39 release has been pulled by Apple and is no longer available for download.

Tag: Safari Technology Preview

Top Rated Comments

Robert.Walter Avatar
Robert.Walter
97 months ago
I installed it. And must say it was the snappiest crash ever!

(Actually did crash on install.)

Edit: I wrote crash on install but this may have been on some kind of auto start during install. I’m not sure, as I wasn’t paying attention, just noticed that the crash report dialogue box popped up.

Also, my Mac mini 2012 is running the latest High Sierra Public Beta installed on 9/1 or 9/2 and, this, I’m running STP for High Sierra.
Score: 4 Votes (Like | Disagree)
Erdbeertorte Avatar
Erdbeertorte
96 months ago
Many thanks for the info!
I just told them to update the article.


Edit: Thanks @Weaselboy :) for updating it.
Score: 2 Votes (Like | Disagree)
dantracht Avatar
dantracht
96 months ago
@dantracht @Vashetti @groovyd

Yes it got pulled as you can see here: https://developer.apple.com/safari/download/

Although it never showed up in the App Store for me since a few versions ago on three different Macs (two got even a few clean installs without backup import in the meanwhile). Even the High Sierra betas sometimes don't show up and I had to download the full installer.

I always check that website every day after a new High Sierra beta had been released.

On all Macs the developer beta access utility was installed.

Still no crash with 39 on my Late 2011 MBP. Didn't test it on the other two Macs yet.



On my iMac there is also still iTunes 12.7 (running fine) what I never got on the other Macs. It had been pulled months ago shortly after release and never came back.
Many thanks for the info!
Score: 1 Votes (Like | Disagree)
PsykX Avatar
PsykX
97 months ago
A very snappy crash!
It was about time they made their crashes snappier!

Works totally fine on my Mac though.
Score: 1 Votes (Like | Disagree)
bradhs Avatar
bradhs
97 months ago
No crashing issues here...
Score: 1 Votes (Like | Disagree)
dlbilling Avatar
dlbilling
97 months ago
Yes, indeed! A very snappy crash! Mine did not crash on install, just the first launch. My MacBook Air is running Sierra 10.12.6.

Is there an option to go back down to release 38?

I'm not a developer, just testing from a user perspective, and only started recently. Is there an official way we should report the problem? Although, I would hope the powers that be already know...

Is our only option to go back to Safari and just wait for another update?
Score: 1 Votes (Like | Disagree)
Read All Comments

Popular Stories

iOS 18

Apple Expected to Release iOS 18.3 Next Week With These New Features

Thursday January 23, 2025 6:41 am PST by
iOS 18.3 should be released to the public next week, following beta testing since mid-December. While the software update is a relatively minor one, it still includes a handful of new features, changes, and bug fixes for iPhones. Below, we recap everything new in iOS 18.3. Notification Summary Changes Examples of inaccurate Apple Intelligence notification summaries Apple Intelligence...
Read Full Article • 29 comments
iOS 18

5 New Things Your iPhone Can Do in iOS 18.3

Friday January 24, 2025 1:55 am PST by
Apple is set to release iOS 18.3 next week, bringing further refinements to Apple Intelligence features, a couple of neat new capabilities to iPhone 15 Pro and iPhone 16 devices, and bug fixes. While not quite as packed with new features as Apple's preceding iOS 18 point releases, iOS 18.3 still introduces capabilities that aim to make your iPhone smarter and more intuitive. Below, we've...
Read Full Article • 26 comments
Generic iOS 18

iOS 18.4 Beta Coming Soon With These New Features for Your iPhone

Friday January 24, 2025 8:16 am PST by
iOS 18.3 is expected to be widely released next week, and that means the first iOS 18.4 beta for iPhones should be just around the corner. Apple has previously implied that iOS 18.4 will be released in April, as that is when it promised to make Apple Intelligence available in even more languages. Below, we outline what to expect from iOS 18.4 so far. Apple Intelligence for Siri Siri ...
Read Full Article • 37 comments
Apple Pay Walmart Feature

Walmart Stands Firm on Why It Doesn't Accept Apple Pay in the U.S.

Thursday January 23, 2025 7:32 am PST by
Walmart still does not accept Apple Pay or other NFC payments at its more than 4,600 stores across the U.S., and it stood firm on its reasoning for that today. A spokesperson for Walmart today informed MacRumors that its position on contactless payments has not changed since we last reached out about the matter in 2022. The big-box retailer said it remains focused on its own convenient...
Read Full Article • 362 comments
apple tv 4k new orange

New Apple TV Launching This Year With These New Features

Wednesday January 22, 2025 6:01 pm PST by
A new Apple TV is expected to be released later this year. In this article, we recap rumored features and changes for the device. The next Apple TV will be equipped with Apple's own combined Wi-Fi and Bluetooth chip, according to Bloomberg's Mark Gurman. He said the chip supports Wi-Fi 6E, which would be an upgrade over the current Apple TV's standard Wi-Fi 6 support. Wi-Fi 6E extends the...
Read Full Article
iOS 18

Here Are Apple's Full Release Notes for iOS 18.3

Tuesday January 21, 2025 4:31 pm PST by
Apple provided developers and public beta testers with the release candidate version of iOS 18.3 today, and with it comes release notes confirming what's new. While we knew about several of the features that are in the update, there are some lesser known tweaks and bug fixes. The update adds new Visual Intelligence features for iPhone 16 models, it tweaks Notification summaries on all...
Read Full Article • 52 comments
iPhone 17 Pro Dual Tone Horizontal Single Feature

Kuo: iPhone 17 Models Won't Have Smaller Dynamic Island

Friday January 24, 2025 9:09 am PST by
The upcoming iPhone 17 models that Apple plans to release this year will not feature a smaller Dynamic Island, Apple analyst Ming-Chi Kuo said today. On social media, he said that he is expecting the size of the Dynamic Island to remain "largely unchanged" across the iPhone 17 lineup. His statement is contrary to prior rumors that we've heard about planned changes for the iPhone 17 models. ...
Read Full Article • 78 comments
iPhone 16 Apple Store Levels

Gurman: Apple Stores Receiving 'Merchandise' Updates Next Week

Saturday January 25, 2025 5:07 pm PST by
Apple's retail stores will be rolling out "merchandise/floor marketing updates" next week, according to Bloomberg's Mark Gurman. Gurman did not explicitly say if the store updates are related to any upcoming product announcements, but he did mention that next week is around the time that Apple rolls out its annual Black Unity watch band for the Apple Watch. In each of the past four years, ...
Read Full Article • 32 comments
apple power beats pro 2

Apple's First Product Announcement of 2025 is Imminent

Thursday January 23, 2025 2:48 pm PST by
It's also time for Apple's first product announcement of the year. Last year, Apple said it would be launching Powerbeats Pro 2 in 2025, and the wireless earbuds are expected to launch very soon. Powerbeats Pro 2 images found in iOS 18 code In his Power On newsletter last weekend, Bloomberg's Mark Gurman said the Powerbeats Pro 2 are "due imminently." In addition to Apple filing the...
Read Full Article