My Mac OSX machine (Yosemite, 10.10.5, "Mid 2009" MacBook Pro model) gets fully-corrupted white-and-gray graphics in the editor under Unity beta 5.3.0b1: It runs previous versions (5.2 and before) fine, so I suspect something goes wrong with the new OpenGL 3.3 engine used for the editor. My Windows machine displays the 5.3.0b1 editor fine, with no corruption. Is there a way I can manually choose the older rendering engine for the editor, in order to use 5.3.0b1 on my Mac? Also, incidentally, how can I "officially" file a bug report to Unity? I have looked around Unity's website for about 15 minutes and still can't find where to do it, though it's probably staring at my face somehow.