I'm on MacOS 11.3, Hub 2.4.5, and alpha 2022.1.0a7. I installed the alpha through the Hub. When creating a new project, or attempting to launch an existing project with the alpha version mentioned, I see a very momentary "blip" of a program opening and closing immediately in the Mac dock. I am assuming this is the Unity editor starting and immediately stopping. After this nothing happens. I would expect the Unity editor to appear on my screen.