What are the minimum hardware and software specifications to install Xcode 10.0 in a MAC mini and Macbook Pro? How much RAM is required? What processor is required?
These are specification for Xcode 10
Xcode 10 requires a Mac running macOS 10.13.6 or later..
Xcode 10 includes SDKs for iOS 12, watchOS 5, macOS 10.14, and tvOS 12.
Xcode 10 supports running multiple concurrent versions of the Xcode app and of any associated tools such as Simulator.
Xcode 10 can coexist with previous versions of Xcode.
reference: https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes