Hi, I am working on an application that stays stuck at the verifying phase when launched on 10.14, but launches just fine on 10.15 and up. The application is signed with codesign. The enclosure is a dmg, codesigned too, notarized and stapled. I can't figure out why the application verification stays stuck. Any debugging advice on that would be much appreciated. Thanks.

I have read that as of macOS X 10.14 setting setAllowsConcurrentViewDrawing to true on a NSWindow and setCanDrawConcurrently to true on its view is no longer supported to perform drawing outside the main thread. All the documentation that I find on the internet strongly advise programmers to cleanup their main loops to perform only drawing and user input handing there. What else is left to do when this means multiple programmer*years of work? I used to draw a CGImage wrapped in a NSImage through a NSGraphicsContext on a separate looping thread calling NSView's needsDisplay then [display], to display smooth animations. I also picked up that NSOpenGLView has been deprecated. With all that said, what would be the best way to go to perform threaded drawing in a NSView? Thanks