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.

Top Rated Comments

Robert.Walter Avatar
61 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
61 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
61 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
61 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
61 months ago
No crashing issues here...
Score: 1 Votes (Like | Disagree)
dlbilling Avatar
61 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)

Popular Stories

RIP iPod Feature

RIP iPod: A Look Back at Apple's Iconic Music Player Over the Years

Friday May 13, 2022 2:25 pm PDT by
Apple earlier this week announced the discontinuation of the iPod touch, and because it was the last iPod still available for purchase, its sunsetting effectively marks the end of the entire iPod lineup. To send the iPod on its way, we thought it would be fun to take a look back at some of the most notable iPod releases over the last 21 years. Original iPod (2001) Introduced in October...
iOS 16 mock for article

Gurman: iOS 16 to Include New Ways of System Interaction and 'Fresh Apple Apps'

Sunday May 15, 2022 6:14 am PDT by
iOS 16 will include new ways of interacting with the system and some "fresh Apple apps," Bloomberg's Mark Gurman has said, offering some more detail on what Apple has in store for the upcoming release of iOS and iPadOS set to be announced in a few weeks at WWDC. In the latest edition of his Power On newsletter, Gurman wrote that while iOS 16 is not likely to introduce a major face-lift to...
14 16 inch 2021 mbps back to back feature orange

Five Things You Still Can't Do With a MacBook Pro

Wednesday May 11, 2022 11:16 am PDT by
It's been over 200 days since Apple debuted its redesigned MacBook Pro lineup. Offered in 14-inch and 16-inch display sizes, the new-look MacBooks wowed Apple fans and creative pros alike with their powerful custom Apple silicon, mini-LED screen, and multiple connectivity options. But there are still some things you can't do with a MacBook Pro. Here are five features some Mac users are still...
iOS 16 mock for article

Which Devices Will iOS 16 and iPadOS 16 Support?

Thursday May 12, 2022 7:29 am PDT by
While there are as yet no concrete rumors related to which devices iOS 16 and iPadOS 16 will support, the discontinuation of the iPod touch earlier this week may be an indication that as many as nine devices could be about to lose support for Apple's upcoming operating systems. iOS and iPadOS 13, 14, and 15 support all of the same devices, with the iPhone 6S and iPhone 6S Plus,...
apple mac ipad watch trade in

Apple Launches Limited-Time Bonus Trade-In Credit for iPhone, iPad, Mac, and Apple Watch in Many Countries

Wednesday May 11, 2022 5:14 am PDT by
Apple has launched a special limited-time offer for iPhone, Apple Watch, Mac, and iPad trade-in that offers customers additional credit when trading in their only device for a new one. The offer is being run in several countries including the US, UK, Germany, Spain, Italy, South Korea, Japan, Taiwan, China, India, and France. In the UK, Apple is offering up to £50 of extra trade-in credit...
sony

Sony Unveils Redesigned WH-1000XM5 Headphones With Improved Noise Cancelation

Thursday May 12, 2022 9:26 am PDT by
Sony's flagship WH-1000XM4 noise-canceling headphones have been among the best on the market for some time, and today Sony announced its fifth-generation WH-1000XM5 headphones, boasting a new design and several improvements over the previous model. The redesigned headphones replace the shrouded arms that swivel on the XM4's with an exposed arm that has a single contact point at the earcups,...
apple tv 4k design clue

Kuo: New Apple TV to Launch in Second Half of 2022, Lower Price Possible

Friday May 13, 2022 7:58 am PDT by
Apple plans to launch a new version of the Apple TV in the second half of 2022, according to well-known analyst Ming-Chi Kuo. In a tweet today, Kuo said the new Apple TV will have an improved cost structure, suggesting that the device could have a lower price that is more competitive with other streaming media players like Google's Chromecast line, Amazon's Fire TV line, and the Roku line. ...
iPhone 14 Purple Feature

Full Range of iPhone 14 Color Options Revealed by Purported Leak From China

Wednesday May 11, 2022 2:20 am PDT by
The iPhone 14 and iPhone 14 Pro models will be available in a refreshed range of color options, including an all-new purple color, according to a recent rumor. The claim comes from a post on Chinese social media site Weibo by an unverified source and purports to reveal the full range of color options for Apple's upcoming iPhone 14 and iPhone 14 Pro models. Compared to the selection of color...