I'm developing a game on Mac and I sent my project files to a friend who has Game Maker on PC so that he could create a PC build for me. The build worked for him, except that for some reason for him nothing is being drawn to the GUI. It's as though no "Draw GUI" events are running. The regular "Draw" events all work and the GUI elements are functional (i.e. if he clicks where a button is supposed to be it still functions) but nothing is visible. Because the problem only manifests on his computer it's impossible for me to do much investigation myself so I hope someone might be able to help. Does anyone know why this might be happening?