Mouse Jumping and Skipping in Half-Life 1 engine games I just installed Parallels 5 on my new 2011 Macbook Pro with the intent of playing a few Half Life 1 engine games with some buddies, because the games are nice and easy to run so I figured the convenience was worth the insignificant performance hit. (I play the more intensive games under Bootcamp) So I installed Half Life 1 and Opposing force, and when I play the mouse will jump extremely fast any time I try to move it quickly, rendering it pretty much unplayable. I tried a few other games not on the goldsrc engine with no problems so I know it's something with the engine. The same problem occurs when playing both fullscreen or windowed. I've been playing HL1 engine games in Parallels 4 for years now, so something must be up. I've been missing out on all of our gaming sessions lately so I'd love to get things set together. So, any ideas? I can do any more testing and put out any more info if need be.