Description of the feature request
Please provide macOS 10.14 (Mojave) stack. There are some use cases that require building on Mojave, for example compiling assets catalog that support Dark Mode.
Use case / for what or how I would use it
For example, compiling assets catalog with Dark appearance support requires building on Mojave. Ref.: https://stackoverflow.com/questions/52872730/darkmode-doesnt-work-on-mojave-when-exported-from-archive