I have constant crashes in OSX and in Windows 7. Have tried OSX Mavericks and Yosemite. Same issue. I tried two completely different GPU's. Same problem. In OSX, Console reports a GPU Hang. It lasts for 10 seconds (complete KSP freeze - OS still works fine) and usually KSP recovers. Sometimes KSP crashes completely. It happens the most when landing on planets. I have tried reducing graphics settings which helps, but doesn't fix the problem. 2010 Mac Pro, 6 core 2.93ghz Xeon CPU. 28GB RAM Radeon 280x GPU. Extremely frustrating.