First macOS Sequoia 15.8.3 and macOS Tahoe 26.7.3 RCs now available [U]

Update, November 5: The release candidates are now available to public beta testers as well. In addition to the release of macOS 27.3 beta 1, Apple is also rolling out the first release candidates of macOS Sequoia 15.8.3 and macOS Tahoe 26.