Ok, I managed to get Metal to work by changing the following in the RenderContextMTL class: I changed ((NSView)Runtime.GetNSObject(window)).Layer.AddSublayer(_layer); to ((NSView)Runtime.GetNSObject(window)).Layer = _layer; And added mTLTextureDescriptor.StorageMode = MTLStorageMode.Private; to the ...

Some more digging into the Metal render context reveals the exception occurs in the following line:

((NSView)Runtime.GetNSObject(window)).Layer.AddSublayer(_layer);

Where, apparently, ((NSView)Runtime.GetNSObject(window)).Layer is null

In preparation of Mono apparently going the way of the dodo with .NET 5 ( https://devblogs.microsoft.com/dotnet/introducing-net-5/ ), are there any plans to support macOS directly or will Xamarin.Mac remain a required dependency for Noesis.App.Displays.AppKit/Noesis.App.RenderContexts.MTL? Since I s...

Okay, so I'm having a few issues getting Noesis GUI to work on my macOS Catalina setup. First off, the Metal render context does not seem to work, forcing me te revert to RenderContextNSGL. Using RenderContextMTL results in a NullReferenceException in NoesisApp.RenderContextMTL.Init(...) at startup....