My game always crashes on a Mac?

Hi…

I was testing my game and for the life of me I can’t get it to run on a Mac laptop, it’s a MacBook Pro, now it did work, when I was using Unity 4, since I’ve upgraded to 5, so I exported to PC, android and I thought my friends Macbook would overwrite and run, every-time a crash, dialog box shows, show unity logo, start game for a few seconds then it freezes, now it just doesn’t show a dialog box and instantly closes, I’ve tried x86 through to universal, please advise me if possible, thanks

Build as 64-bit.

–Eric

Thanks, if there is any special way to do this then, I’m sure it’s been tried by me, thus the mystery, I thought its my player settings as exporting to Android for example would crash unless I unchecked multi-threaded whatever can’t remember right now but I thought it was something like that on the Mac player side but I can’t see anything, I thought next to try a different laptop mac system, I may get myself a cheap ipad or something, anyhew cheers