Apple today seeded a second release candidate (RC) version of an upcoming macOS Sonoma 14.2 update to developers for testing purposes, with the software coming few days after Apple seeded the first RC. The second RC has a build number of 23C64, up from 23C63 for the first RC
Registered developers can opt-in to the beta through the Software Update section of the System Settings app. Under Beta updates, toggle on the Sonoma Developer Beta. Note that an Apple ID associated with an Apple Developer account is required to get the beta.
The release candidate version of macOS Sonoma 14.2 represents the finalized version of the softwae that will be released to the public should no major issues be found.
Read more at MacRumors.com