Below are two methods of performing a right click on a Mac.The most common is to use the control key (Ctrl), press and hold the Control (Ctrl) key while you click the mouse button.If you don't have a mouse but only have a trackpad you can enable the two finger trackpad right click. This can be done via the following procedure:System Preferences -> TrackpadOpen the Trackpad and navigate to the Point & Click tabCheck Secondary click is checked and the Click or tap with two fingers option is selectedYou will see a short video example of the proper way to clickIf you now go to Finder and use the two finger method as shown in the video the context menu should appear, apply this method whenever you need to right click in iSeeFurther information and details can be found here.