Update your apps to use new features, and test your apps against API changes.
- macOS 10.14.1+
The macOS 10.14.1 SDK provides support for developing apps for Macs running macOS Mojave 10.14.2. The SDK comes bundled with Xcode 10.1 available from the Mac App Store. For information on the compatibility requirements for Xcode 10.1, see Xcode Release Notes.
macOS 10.14.2 requires that publicly-trusted Transport Layer Security (TLS) server authentication certificates issued after October 15, 2018 meet the Certificate Transparency policy to be evaluated as trusted on Apple platforms. (41175212)