Are you using an intel integrated graphics card on the other computers?
I've tested my game on a few computers and it always gets a little wonky if it has one of these graphic cards, even if they're updated. I've had no problems when using AMD or Nvidia graphic cards though.
Yes, It is my macbook air. So it has an integrated card. But the windows version works fine, even through VMare. Its only when I try to launch the OSX version that I have the issues,