Apple has released the third beta of macOS Ventura 13.3 to developers to try out.
Developers participating in the beta testing program can get the latest builds through the Apple Developer Center or by updating hardware that is already running beta software. Public betas usually appear shortly after developer releases and are available through Apple’s beta testing program.
and Apple strongly advises users not to install beta operating systems, or beta software in general, on “critical” or essential devices, as there is a potential for issues that could result in data loss. Instead, testers should use secondary or non-essential hardware and ensure that they have sufficient backups of their important data at all times.