MacRumors published a story that Apple has released the first beta of macOS 13 Ventura to registered developers.
Apple Seeds First Beta of macOS 13 Ventura to Developers
After today's keynote event that saw the unveiling of macOS 13 Ventura, the newest version of the Mac operating system, Apple has seeded the first beta of the new software to developers for testing purposes.
Apple Seeds First Beta of macOS 13 Ventura to Developers
Registered developers can download the beta through the Apple Developer Center and once the appropriate profile is installed, betas will be available through the Software Update mechanism in System Preferences.