Thanks for the heads up. i will create a feature request. This is not just to get a channel between host and guest. This is for creating isolated host only network with guest and also a port forward from host to guest. i am trying to add these features to my virtual machine manager application. I dont have expertise in creating user space networking.

Thank you for the reply. it seems to be that this is a bit complex task for a novice. can you please guid me on where to look for some samples on how to achive this using VZFileHandleNetworkDeviceAttachment

I am also having the problem. as a workaround if i trigger this func func triggerNewWindowMenuItem() { guard let mainMenu = NSApp.mainMenu else { return } // Locate the "File" menu if let fileMenuItem = mainMenu.items.first(where: { $0.title == "File" }), let fileSubmenu = fileMenuItem.submenu { // Locate the "New Window" item by title if let newWindowMenuItem = fileSubmenu.items.first(where: { $0.title == "New Window" }), let action = newWindowMenuItem.action { // Trigger its action NSApp.sendAction(action, to: newWindowMenuItem.target, from: nil) } } } func applicationDidFinishLaunching(_ notification: Notification) { if NSApp.windows.isEmpty { self.triggerNewWindowMenuItem() } It just a workaround. hope apple comes up with a proper fix for this.

Here is the bug report number FB17262771

Hmmm, and that works? Yes it works. there are some blocks like relocating the recovery partition to end( that can be done) and after that using disk utility we can resize main partition. but the hdiutil snadbox limitation makes not possible to do with appstore app. may be ,i need to release a separate tool for this without app sandbox to get it done.

i moved setting window.isReleasedWhenClosed true to OnDisappear and the problems is solved and NSApplication.shared.windows does not retain any windows that are closed. thanks

Is your app sandboxed because you plan to ship in the Mac App Store? Or just because it’s the right thing to do? I have the only option to distibute it to appstore because i cant manage the payment details outside of the appstore because it is very small business. How does this disk image fit into your virtualisation product? Specifically, what overall format is it? And what file system do you have on it? And how are you attaching it to your VM? And is your VM focused on macOS? Or Linux? Or both? The disk image format is img i attach it as a virtio blcok device as metnioned. i just followed this article Creating mac os virtual machine for creating and attaching to the virtual machine. The vm is focused on both linux and macOS. the files system in mac os apfs and in linux it is ext4. What are the other options i have got. By the way this is the app VirtualProg i have got in the appstore. Resizing the hard disk image within the app will add value to the product. that is i am here. thanks

Yes you may be right kernel may not support virtio gpu. i tested the commnad line distros with virtio console device they work fine though via serial output.

@DaisySun how did you request teh com.apple.vm.networking entitilement with apple. Coyld you please let us know what is the procedure for making a request and where to request. thanks

i have contacted apple developer support and here is the reply i received from them Thank you for contacting Apple Developer Technical Support (DTS). We have reviewed your request and have concluded that there is no supported way to achieve the desired functionality given the currently shipping system configurations. If you would like for Apple to consider adding support for such features, please submit your suggestion request via Feedback Assistant (https://feedbackassistant.apple.com). For more information on Feedback Assistant, please visit https://developer.apple.com/bug-reporting/.