I have been building a log in scene with NGUI 2.6.3 and testing it mostly on my Windows machine, with infrequent testing on Mac. When I run the scene in my Mac Unity editor (I'm on Unity 4.2), it appears to be working correctly. I can see the labels just fine. However, when I build the game to standalone, the labels are no longer visible, but I can still see the main header label.
I did some testing where I put an arbitrary string in the (standalone-invisible) label, it was visible then on both Editor and Standalone. So, that let me know that it didn't have anything to do with the resolution of the window. But, when I try to fill them in on my own in script, they aren't visible in the standalone. Am I missing anything, or the dll doesn't work for Mac or something?