I've recently bought a 24" Mac G5. I've installed windows proffesional with no problems and am currently playing Half Life Holiday 2006 Collection. I've started at the beggining at (Half Life) The Source and what it is, is when I run the source everything is fine. Except for certain bits when I see a load of white line's (which so far only ocurrs when looking into water which has something moving within it) quite annoying to say the least. I know this is probably a simple issue but could anyone impart there wisdom upon me so that I may enjoy the Half Life series.