I always drop my aim as well, its probably best to do that - once people start sprint-strafing, its quite hard to get headshots. Either that or its just an excuse A good score on that game is around... 300,000 - Its actually better not to attempt to shoot than miss. Also, it teaches you especially well not to aim by strafing, rather to aim by pointing. Mac compatability - I haven't got a clue.... I guess?