I'm playing syndicate on my mac, but when ever i right click, my agents don't shoot. the only time i ever get them to shoot is to go into panic mode, and even then i can't complete the first mission. Do I need to have a mouse, or is there another way to use it

I do have the same issue.

Found a Fix: you have to use the two finger click to right click. it should be enabled by default but if not check in your settings under trackpad