Swift 4 macOS Window Hello World

HelloWindow.swift

// Hello World Window macOS Swift 4: Creates an empty window
  
import AppKit

let nsapp = NSApplication.shared
let rect = NSMakeRect(0, 0, 200, 200)
if #available(macOS 10.10, *) {
        let window = NSWindow(contentRect: rect,
                              styleMask: .fullSizeContentView,
                              backing: NSWindow.BackingStoreType.buffered,
                              defer: false)
        window.makeKeyAndOrderFront(nil)
}
nsapp.run()

Info.plist

<plist><dict/></plist>

Makefile

TARGET=HelloWindow

all: $(TARGET)
t: test
test: $(TARGET)
	./$(TARGET)
$(TARGET): $(TARGET).swift
	swiftc -o $(TARGET) $(TARGET).swift
e: edit
edit:
	vi $(TARGET).swift
c: clean
clean:
	rm -f $(TARGET) *.o