https://9to5mac.com/2026/03/18/macos-26-4-release-notes-apple-details-six-new-features-for-mac/
macOS 26.4 release notes: Apple details six new features for Mac - 9to5Mac
Mar 18, 2026 - Alongside the iOS 26.4 RC, Apple released the macOS 26.4 RC to developers and public beta testers today. The update...
release notes applesix new
https://developer.apple.com/documentation/safari-technology-preview-release-notes
Safari Technology Preview Release Notes | Apple Developer Documentation
Learn about changes for Safari Technology Preview releases and Web Inspector for macOS.
safari technology preview