I'm doing an experiment integrating SwiftUI views as Materials for a SceneKit scene SCNPanel node. It is working perfectly in iOS using UIHostingController with the following code: Swift func createInfoPanel() { let panel = SCNPlane(width: 6.0, height: 6.0) let panelNode = SCNNode(geometry: panel) let infoPanelHost = SCNHostingController(rootView: helloWorld) infoPanelHost.view.isOpaque = false infoPanelHost.view.backgroundColor = SCNColor.clear infoPanelHost.view.frame = CGRect(x: 0, y: 0, width: 256, height: 256) panel.materials.first?.diffuse.contents = infoPanelHost.view panel.materials.first?.emission.contents = infoPanelHost.view panel.materials.first?.emission.intensity = 3.0 [... BillBoardConstraint etc here ...] addNodeToScene(panelNode) } Yet, when I tried to apply the same to macOS, I don't seem to be able to make the view created by NSHostingController transparent. Invoking infoPanelHost.view.isOpaque = false returns an error, saying isOpaque is read-only and can't be set. I tried subclassing NSHostingController and overriding viewWillAppear to try and make the view transparent / non-opaque, to no avail. Swift override func viewWillAppear() { super.viewWillAppear() self.view.wantsLayer = true self.view.layer?.backgroundColor = NSColor.clear.cgColor self.view.layer?.isOpaque = false self.view.opaqueAncestor?.layer?.backgroundColor = NSColor.clear.cgColor self.view.opaqueAncestor?.layer?.isOpaque = false self.view.opaqueAncestor?.alphaValue = 0.0 self.view.alphaValue = 0.0 self.view.window?.isOpaque = false self.view.window?.backgroundColor = NSColor.clear     } Tried setting everything I could think of to non-opaque as you can see, and still, the panels are opaque, show no info, and obscure the 3D entity they should overlay... Can someone please advise?