Highway Rally is a free 3D car racing game developed by M2H.
"Highway Rally features extreme racing on 26 different highway tracks where your aim is to beat checkpoints and target times in order to unlock special cars, cash, and new levels. Times are divided into gold, silver or bronze and you can earn extra cash by pulling-off stunts such as jumping and drifting. There are 15 different vehicles to choose from and you there are even speed-cameras which allow you to share shots of you speeding on Facebook and Twitter."
Mac OSX 10.6 or newer
Free download at softonic.com