FutureBasic's latest version requires macOS 10.13+. Please follow these installation steps:
app via their Mac App Store (MAS).
Launch Xcode and allow it to download and install any additional tools. Xcode's prompt looks like this:
you've allowed Xcode to download any additional files, Quit the Xcode app. If Xcode's installation is satisfactory, you won't need to run it again to use FutureBasic.
Download the latest FutureBasic version and move it to the standard /Applications directory.
Create a new file (⌘N), type some code (see brief sample below) in the document window and run it (⌘R).