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Safari 26.6 Release Notes

Released July 27, 2026 — 26.6 (20624.4.5)

Overview

Safari 26.6 is available for iOS 26.6, iPadOS 26.6, visionOS 26.6, macOS 26.6, macOS Sequoia, and macOS Sonoma.

CSS

Resolved Issues

  • Fixed an issue where the ic length unit scaled incorrectly with page zoom, causing it to no longer equal 1em as expected by the CSS specification. (174857144)

  • Fixed an issue where fixed-positioned elements using position-area did not fall back properly when the body was scrollable. (175544079)

  • Fixed an issue where CSS zoom interacted incorrectly with font-size, font-weight, font-variant, and font-style on iPad when requesting the desktop website. (176647969)

Networking

Resolved Issues

  • Fixed an issue where partitioned cookies could not be deleted using WKHTTPCookieStore. (176097960)

Service Workers

Resolved Issues

  • Fixed an issue where service worker registrations with missing main scripts were not automatically unregistered, preventing pages from re-registering new service workers. (175522651)

  • Fixed an issue where service worker registrations with missing imported scripts were not automatically unregistered. (175522816)

Web Extensions

Resolved Issues

  • Fixed an issue where web extension service worker registration database files accumulated on each Safari launch, causing performance degradation. (175810627)

WebAssembly

New Features

  • Added compileOptions parameter to WebAssembly.compileStreaming and WebAssembly.instantiateStreaming for JS String Builtins support. (174858653)

WebRTC

Resolved Issues

  • Fixed an issue where RTCPeerConnection configured with iceTransportPolicy: "relay" failed to gather any ICE candidates on macOS Sequoia. (175009190)

See Also

Version 26