I am running mac OS X Mavericks (10.10.2). The first time I open my project/edit it, it works fine. But, when I save and reopen the file, everything works fine, except that Unity doesn’t render any of the elements of the game in the window.
I’m on Windows, but I guess that doesn’t really matter for this particular case.
Unity remembers opened scene only for the last opened project. So just open the scene after opening project, if you have saved the scene obviously