A minimal Metal demo application for macOS, iOS, tvOS and SPM. This app demonstrates how to use a display link to sychronize with the monitor refresh rate and how to setup a Metal based view without any higher level frameworks. It also does not use any Storyboards or Xibs.
Either open MetalApp.xcodeproj and run one of the MatalApp_* targets or execute swift run to start the SPM based Metal app.