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Apple Releases Safari Technology Preview 39, But New Version Crashes on Launch [Updated]

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Apple 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.

Article Link: Apple Releases Safari Technology Preview 39, But New Version Crashes on Launch [Updated]
 
Article Link
https://www.macrumors.com/2017/09/06/apple-releases-safari-technology-preview-39/
nutmac said:
Safari Technology Preview doesn't install in High Sierra as included browser is a superset of Technology Preview.
Click to expand...

Sure it does, Apple’s been including a special build for macOS HS users and updating them via MAS since the first beta. It’s even linked in the article.
 
nutmac said:
Safari Technology Preview doesn't install in High Sierra as included browser is a superset of Technology Preview.
Click to expand...
There is a version of STP for High Sierra linked in the article. STP to this day is ahead of Safari in the latest High Sierra beta.
 
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.
 
Last edited:
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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?
 
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dlbilling said:
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?
Click to expand...
@dlbilling Safari Technology Preview does not overwrite Safari. They are two separate programs, so you don't need to roll back anything -- just use plain Safari if STP is not working for you.
 
dlbilling said:
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?
Click to expand...

The website looks to be rolled back (at least it says 38 on it), so I would try redownloading it.
 
Donovan Dillon said:
@dlbilling Safari Technology Preview does not overwrite Safari. They are two separate programs, so you don't need to roll back anything -- just use plain Safari if STP is not working for you.
Click to expand...


Oh, yes, I know that! ;) That is what I'm using to access this forum. I was just enjoying using STP! =) If I had the option to go back to 38, I'd choose to do that versus using Safari.
[doublepost=1504742520][/doublepost]
reallynotnick said:
The website looks to be rolled back (at least it says 38 on it), so I would try redownloading it.
Click to expand...


Oh, cool! I must have checked it just before it changed. Thank you for the heads up! =) Appreciate it!
 
I am using the TP since the first version as my main browser and this one for many hours now on 10.13 DB9. I never experienced any crash at all for all versions.
 
I'm surmising the v.39 update has been pulled, at this writing it's not showing up on the MAS and the web site is showing v.38 as the current available version.
 
Back to 38 and happy! =) Just had to delete 39 first and then downloaded/installed 38.
 
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