# 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) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)