Apple Releases Safari Technology Preview 197 – Brings macOS Sequoia Support

Apple has released Safari Technology Preview 197, the latest version of their developer preview web browser. The preview version of Apple’s popular browser offers developers and other interested users the ability to try out features that may or may not, debut in future public release versions of Safari.

Safari Technology Preview‌ 197 includes fixes and updates for Canvas, CSS, Forms, JavaScript, Media, Rendering, Security, SVG, Web Inspector, WebDriver, and WebGL.

The current ‌Safari Technology Preview‌ release is compatible with machines macOS Sonoma and the macOS Sequoia beta, the newest version of macOS that Apple is beta testing.

Overview

Safari Technology Preview Release 197 is now available for download for macOS Sequoia beta and macOS Sonoma. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update.

This release includes WebKit changes between: 279361@main…279854@main.

Canvas

Resolved Issues

• Fixed a detached OffscreenCanvas to not transfer an ImageBuffer. (279775@main) (129270155)

CSS

Resolved Issues

• Fixed custom counter styles disclosure-open and disclosure-closed to point to the correct direction in right-to-left. (279404@main) (109014745)

Forms

Resolved Issues

• Fixed form controls drawing with an active appearance when the window is inactive. (279458@main) (127391198)

JavaScript

Resolved Issues

• Fixed fractionalDigits of Intl.DurationFormat to be treated as at most 9 digits if it is omitted. (279632@main) (129145390)

Media

Resolved Issues

• Fixed multiple cases of audio distortion occurring when using AudioWorklets. (279409@main) (128551401)

Rendering

Resolved Issues

• Fixed min-content calculation for unstyled only-child inlines elements. (273633@main) (128348427)
• Fixed ellipsis rendering multiple times when position: relative and top are used. (279645@main) (128394449)
• Fixed a bug for inline elements inserted in reverse order after a block in a continuation. (279422@main) (128826228)
• Fixed the flash of a page background-colored bar in the footer when the window is resized. (279562@main) (128940179)

Security

Resolved Issues

• Fixed CORS bypass on private localhost domain using 0.0.0.0 host and mode “no-cors”. (279835@main) (125913679)

SVG

Resolved Issues

• Fixed error handling for invalid filter primitive references. (279421@main) (104262208)
• Fixed SVGLength to sync with the WebIDL specification. (279659@main) (129169603)

Web Inspector

Resolved Issues

• Fixed Web Inspector to show nested workers. (279793@main) (108322385)
• Fixed Accessibility inspector for switch controls to report “State: on/off” instead of “Checked: true/false”. (279772@main) (128952449)

WebDriver

Resolved Issues

• Fixed retrieving titles containing multibyte characters. (279767@main) (123987149)

WebGL

Resolved Issues

• Fixed OffscreenCanvas.transferToImageBuffer() to clear the WebGL drawing buffer. (279434@main) (126738038)

While the preview is intended for use by developers and advanced users, to provide Apple with feedback on the development of the Safari browser, it can be run side-by-side with the release version of Safari. The app doesn’t require a developer account to download and install. For more information, visit the Safari Technology Preview website.