Update, October 7: Apple has now released both RCs to public beta testers as well. The build numbers are unchanged from the developer RCs. In addition to releasing macOS 27.
Source: [9to5Mac](https://9to5mac.com/2026/10/07/first-rcs-for-macos-sequoia-15-8-2-and-macos-tahoe-26-7-2-now-available-to-developers/)