In my app, I need to show user's local file whose location is stored in a ObservableObject called ImageModel. Values of ImageModel will be changed in background and affect the interface. Strange memory leak happens when loading local JPG file in background (window not being the key or main window). I call it strange because when the window becomes key or main window, the memory will be correctly released, but the memory consumed endlessly increases when window is in background. According to Instrument, memory leak is caused by AppleJPEGReadPlugin::copyIOSurfaceCallback. XCode 11.6 on MacOS 10.15.6 Is this a bug and is there a way to avoid this? I made my code as simple as possible. ImageView.swift import SwiftUI struct ImageView: View {   @EnvironmentObject var image: ImageModel   var body: some View { image.getImage() } } class ImageModel: ObservableObject {   @Published var toggle: Bool = true   func getImage() -> Image {     return Image(nsImage: NSImage(byReferencing: URL(fileURLWithPath: "/Users/geeeeoff/Downloads/demo.jpeg")))   } } AppDelegate.swift import Cocoa import SwiftUI @NSApplicationMain class AppDelegate: NSObject, NSApplicationDelegate {   var window: NSWindow!   var image = ImageModel()   func applicationDidFinishLaunching(_ aNotification: Notification) {     window = NSWindow(       contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),       styleMask: [.titled, .closable],       backing: .buffered, defer: false     )     let contentView = ImageView().environmentObject(image)     Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { _ in self.image.toggle.toggle() }.fire()     window.contentView = NSHostingView(rootView: contentView)     window.makeKeyAndOrderFront(nil)   } }