Hello, I have had a minor but annoying problem. I am on the Mac Yosemite, and I am ususing the Karyonix shaders. Sometimes I'll just lest a replay video render for a while, and open up other applications, and kind of ignore it while it's rendering, and when it's done rendering, I open it, and it says either upload to youtube or open replay folder, but when I click on the screen, I can't find or move my mouse, and I have to press alt f4 to even move it. Is it just a problem with my computer or does this sometimes happen?