Using newest Yosemite on a 2 week old MBPr 15.4" w/ 8GB ram and 256SSD. I can't tell you how to reproduce this because it is happening over and over with various stuff. If KSP crashes to the Desktop, which seems like constantly, it doesn't actually close. As you can see from the photo it isn't running anywhere, yet the process is still going pulling cycles. I am writing this about 15 minutes after the crash and it is still pulling proc time and draining my battery. On two occasions there has been multiple instances of the process going on at the same time, I was bleeding off about 1-2% battery life per minute while this was happening. This is happening with both .90 and .25, both unmodded. This is also happening once the Aggressive Textures pack was applied. http://i.imgur.com/pVfBr09.jpg