import Cocoa import FlutterMacOS class MainFlutterWindow: NSWindow { override func awakeFromNib() { let flutterViewController = FlutterViewController() let windowFrame = self.frame self.contentViewController = flutterViewController let newWindowRect = NSRect( x: windowFrame.origin.x, y: windowFrame.origin.y, width: 400, height: 777 ) self.setFrame(newWindowRect, display: true) RegisterGeneratedPlugins(registry: flutterViewController) super.awakeFromNib() } }