half life 2 ep 1 problem intro

when she tells me to take the gravity gun from the robot at the beginning, i click and click and nothing happens. she just keeps telling me to take the grav gun. i bought it for my mac. any ideas guys?

Try just walking up to him and it should be automatic - no clicking involved.

If that doesn't work, try the "use" key, by default, on Windows at least is the "E" key.