I had a working version of opengl code that works correctly on macOS 10.13.6 but has stopped working 10.14. The code simply shows me a blank screen. Is it because the opengl api have started to be marked deprecated.
opengl showing blank window
I had the same issue when testing my app on macOS 10.14. It turned out that the blank window was caused by some of the data not having been initialized correctly because the order in which the different methods of NSOpenGLView were called changed in macOS 10.14. Perhaps you could try ensuring that all your instance properties are initialized in your drawRect method.