In addition to iOS 12.1.1, Apple today also released tvOS 12.1.1 and macOS Mojave 10.14.2. Both updates have been in beta testing for about a month, and can be installed using each platform's respective over-the-air mechanisms.
Apple on Wednesday seeded a fourth beta of macOS Mojave 10.14.2 to its registered developers and members of the Apple Developer Program. The software will mark the second major update to Mojave since its September 2018 release.
Apple on Thursday seeded new developer betas for its upcoming platform updates. Members of Apple's developer program can install beta 3 of iOS 12.1.1, macOS 10.14.2 and tvOS 12.1.1, as well as watchOS 5.1.2 beta 2, via their respective OTA updates, or they can be downloaded from the Dev Center.
Apple has seeded the second beta of its upcoming macOS Mojave 10.14.2 to developers this morning. The release is marked with build number 18C38b, and it comes a week after Apple issued the first beta of 10.14.2—which it subsequently pulled and then reposted on Thursday.
The first beta of macOS Mojave 10.14.2, released earlier this morning alongside other minor developer betas for iOS 12.1.1 and tvOS 12.1.1, is no longer found on Apple's Dev Center. UPDATE: On Thursday, November 1, the pulled beta again became available for developers to download through Apple's Dev Center portal.
Apple on Wednesday pushed first betas of what would become the minor iOS 12.1.1, tvOS 12.1.1 and macOS Mojave 10.14.2 updates. The betas are available to Apple's registered developers and members of the Apple Developer Program. Public betas should follow shortly after the developer builds, but you'll need to register with the Apple Beta Software Program.