https://techcrunch.com/2021/07/01/macos-montereys-public-beta-is-live/

Yesterday Apple unleashed a whole bunch of new public betas on the world: iOS 15, iPadOS 15 and watchOS 8. Today the company is back with another big software puzzle piece announced at WWDC in June.

Following three weeks of developer beta, the public beta version of macOS 12.0 Monterey is now live for download (i.e. has begun a rollout that often takes a little time to make its way to everyone).