I want to have a little play around with Sprite Kit, just for fun really. I decided that I would like to target OS X initially. I've tried building and running the default Sprite Kit template project. I have made no changes to it. It builds with no errors, but when the product is run, the graphics in the window are completely corrupted. This is supposed to be a few spinning spaceships. The lumps of stuff do spin, but they don't look anything like a ship: I can build the iOS Sprite Kit template project and run it in the simulator with no problems. Perhaps for now I just need to play around with SK for iOS instead, but I would prefer to mess around with OS X projects. Any ideas? I'm using Xcode 7.2 on OS X 10.10.5. The build target was set to 10.10.5.