Very strange indeed. Could it be that you're holding down the Control-button? This makes people walk over instead of working. Otherwise I really don't know what might be causing this (have tested it on different OSX devices).
Hey there. Not holding down the control button too long. I've tried it every which way. The workers will not interact with the environment. I do not have an OSX device to try this on. I've uninstalled, reinstalled, both steam as a whole and the program. There must be a solution to this problem. I would really love to play this game I bought.
Josh