Apple Releases Safari Technology Preview 163 With Bug Fixes and Performance Improvements - MacRumors
Skip to Content

Apple Releases Safari Technology Preview 163 With Bug Fixes and Performance Improvements

by

Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced 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 Feature
‌Safari Technology Preview‌ release 163 includes bug fixes and performance improvements for Web Inspector, Masonry Layout, CSS Custom Properties, Media Queries, CSS, Forms, Rendering, JavaScript, WebAssembly, Gamepad API, Web API, WebGL, SVG, Scrolling, Media, Accessibility, WebDriver, Safari Web Extensions, and more.

The current ‌Safari Technology Preview‌ release is version 16.4 and is compatible with machines running macOS Ventura and macOS Monterey.

The ‌Safari Technology Preview‌ update is available through the Software Update mechanism in System Preferences or System Settings 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

Popular Stories

iOS 27 Next to iPhone

Here's When iOS 27 Rolls Out Today in Every Time Zone [Update: It's Out]

Sunday September 13, 2026 3:00 am PDT by
Update 10:04 a.m.: iOS 27 is rolling out now, though it may take a bit for all users to see it, so keep checking! Apple is about to release iOS 27, which will finally deliver more advanced Siri AI capabilities as well as a variety of other refinements, improvements, and new features to iPhones. It's Apple's biggest software update of the year, and Apple announced at Wednesday's iPhone event...
Read Full Article • 151 comments
iOS 27 Icon iPhone

iOS 27 Available Today With These 8 New Features

Monday September 14, 2026 9:00 am PDT by
Update: Apple has released iOS 27. During its iPhone 18 Pro and iPhone Duo event last week, Apple announced that iOS 27 will be released widely on Monday, September 14. iOS 27 should be available around 10 a.m. Pacific Time / 1 p.m. Eastern Time today via the Settings app, under General → Software Update. Below, we have highlighted eight new features and changes coming with iOS...
Read Full Article • 110 comments
deep black iphone 18 pro

Apple Says iPhone 18 Pro Max Sold in U.S. Differs in One Way

Saturday September 12, 2026 3:27 pm PDT by
As noted by Nicolas Lellouche, who writes for the French tech website Numerama, Apple has updated its tech specs pages for the iPhone 18 Pro and iPhone 18 Pro Max to clarify which models are equipped with its new C2 cellular modem and where. Apple now says the iPhone 18 Pro has a C2 modem worldwide, while the iPhone 18 Pro Max uses the chip in every country except for the U.S. According...
Read Full Article • 137 comments

Top Rated Comments

G
gk_brown
47 months ago
Apple used to offer Safari for Windows. Since they are (supposedly) being forced to allow other rendering engines on iOS, maybe now would be a good time for them to make Safari cross-platform again...
Score: 4 Votes (Like | Disagree)
MrNomNoms Avatar
MrNomNoms
47 months ago

Same here, 16Gb RAM and always get the low on memory or this page is using resources and asking me to close the page. Never happened before Ventura.
Many times on facebook, the page won't scroll down and I have to re-load the page.
Really infuriating
I've got 32GB on my Studio and 24GB on my MacBook Air M2 but I still receive that same message particularly when it comes to a variety of different web technology heavy websites. It has basically gotten to the point that I've moved back to Chrome. I really want Safari/Webkit to be a solid competitor to Chrome but Apple certainly make it difficult when these long standing issues are either being ignored or developers deny that they exist in the first place.
Score: 3 Votes (Like | Disagree)
S
Sheepish-Lord
47 months ago

Same, and I don't get it. It's just the web...what does Chrome *really* do that Safari doesn't? Aside from consuming incredible amounts of memory, that is...
I can take a brand new Mac out of the box, open Safari, and go to the Nike website (Apple Card 3% partner btw) and start scrolling through shoes. Eventually the images for shoes will stop loading for ones that have multiple color options so you just see a website sprinkled with pictures and blank white boxes. You have to scroll over the empty box for it to populate an image.

This is the most basic thing and Safari can’t get it right and hasn’t for a long time. However, Safari Tech Preview does for some reason. I’ve tried on Apple store computers and my own and it always fails.
Score: 3 Votes (Like | Disagree)
MrNomNoms Avatar
MrNomNoms
47 months ago

I see there's STILL no overflow menu for your Safari Extensions? Seems odd, it's been a while now since Safari's pushed using various Extensions. You'd think SOMEone working on Safari would understand this need...


I get the distinct feeling that no one uses extensions inside Apple based on how they ignore content blocking extension developers requests to address functionality holes in their MV3 implementation.
Score: 2 Votes (Like | Disagree)
Reason077 Avatar
Reason077
47 months ago
Good to know that Apple are still actually working on Safari. Sometimes I worry that they're close to throwing in the towel.
Score: 2 Votes (Like | Disagree)
AppleFan4U Avatar
AppleFan4U
47 months ago

Same, and I don't get it. It's just the web...what does Chrome *really* do that Safari doesn't? Aside from consuming incredible amounts of memory, that is...
JavaScript for one. I run into issues about once a week where Safari won't display something. Have to use Firefox or Chrome for it to run properly. I wish I could only use Safari!! It got a lot worse with my first M1. That was 4-M1's ago 🤣🙄😂
Score: 2 Votes (Like | Disagree)
Read All Comments