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
97 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
97 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

iOS 18.4 Coming Next Week With These New Features for Your iPhone

Friday February 14, 2025 6:18 am PST by
The first iOS 18.4 beta for iPhones should be just around the corner, and the update is expected to include many new features and changes. Bloomberg's Mark Gurman expects the iOS 18.4 beta to be released by next week. Below, we outline what to expect from iOS 18.4 so far. Apple Intelligence for Siri Siri is expected to get several enhancements powered by Apple Intelligence on iOS...
Read Full Article
iPhone 17 Roundup Feature 2

iPhone Design to Change 'Significantly' This Year

Monday February 17, 2025 7:09 am PST by
Apple is set to "significantly change" the iPhone's design language later this year, according to a Weibo leaker. In a new post, the user known "Digital Chat Station" said that the iPhone's design is "starting to change significantly" this year. The "iPhone 17 Air" reportedly features a "horizontal, bar-shaped" design on the rear, likely referring to an elongated camera bump. On the other...
Read Full Article • 238 comments
apple launch feb 2025 alt

What to Expect From the 'Apple Launch' Next Week

Thursday February 13, 2025 11:48 am PST by
Apple has yet to announce any new devices this year, but that could change starting next week. Apple CEO Tim Cook today said to "get ready" for a "launch" on Wednesday, February 19. "Get ready to meet the newest member of the family," said Cook, in a social media post. The post includes an #AppleLaunch hashtag, along with a short video featuring an animated Apple logo inside of a circle....
Read Full Article • 83 comments
Apple Maps 2024

Apple Maps Might Start Showing Ads

Sunday February 16, 2025 7:22 am PST by
Apple is "exploring" the idea of showing search ads in the Apple Maps app, according to Bloomberg's Mark Gurman. Back in 2022, Gurman said software engineering was "already underway" to display ads in the Apple Maps app, but Apple did not move forward with the idea at the time. Today, he said Apple is "giving this notion more thought" again. This time around, he said Apple has yet to...
Read Full Article • 441 comments
Tim Cook Apple Park

10+ Announcements Apple Could Have Rolled Into a February Event

Saturday February 15, 2025 8:00 am PST by
Apple appears to have enough upcoming product announcements to justify a full event this month, yet all signs indicate these reveals will be handled through a series of press releases instead. There are a multitude of rumors from reliable sources about specific announcements in the coming weeks, so here's everything that Apple could have feasibly included in a hypothetical February event: ...
Read Full Article • 93 comments
iPhone 17 Pro Render Front Page Tech

iPhone 17 Pro With All-New Camera Bar Design Allegedly Revealed

Thursday February 13, 2025 5:49 pm PST by
Apple's next-generation iPhone 17 Pro will feature three rear cameras arranged in a familiar triangular layout, but the cameras will be housed in an all-new rectangular camera bar with rounded corners, according to YouTube channel Front Page Tech. iPhone 17 Pro camera design render created by Asher for Front Page Tech In a video uploaded today, Front Page Tech host Jon Prosser said the camera ...
Read Full Article • 273 comments
m2 pro mac mini

Apple is Now Selling a Refurbished Mac Mini for Just $319 (!)

Saturday February 15, 2025 9:58 am PST by
A few days ago, we reported that Apple's refurbished Mac mini pricing had a problem, and it appears that Apple has taken note. Apple was offering a refurbished Mac mini with the M2 chip, 16GB of RAM, and 256GB of storage for $559, which was $50 more than a refurbished Mac mini with the M4 chip, 16GB of RAM, and 256GB of storage. All other key specifications were equal. That's no longer...
Read Full Article • 166 comments
iPhone SE 4 Thumb 1

Apple's Next iPhone SE Launching on Wednesday - Here's What We Know

Friday February 14, 2025 4:04 pm PST by
Apple CEO Tim Cook teased an Apple announcement that's coming on Wednesday, February 19, and it's looking like that mystery announcement will be the next-generation iPhone SE. We've been hearing about the iPhone SE 4 for quite some time now, and we essentially know everything to expect. If you want a sneak peek at what's coming, read on. Naming Apple first introduced the iPhone SE in...
Read Full Article • 171 comments