There are a few different ways that you can right click with an Apple mouse. The first way is to simply press the secondary button on the mouse. This button is typically located on the right side of the mouse, near your index finger. If you don't see a secondary button, that means your mouse doesn't support this method of right clicking.
Another way to right click is by using a modifier key. On most Apple keyboards, the modifier keys are located in the bottom left corner of the keyboard. To use a modifier key for right clicking, simply hold down the appropriate modifier key while clicking the primary button on your mouse. For example, if you're using a Mac with an OS X operating system, you would hold down the Control key while clicking to simulate a right-click.
If your mouse supports Force Touch, then you can also use that feature to right-click. Force Touch is pressure sensitive and allows you to perform different actions depending on how hard you press down on it. To enable Force Touch for right clicks, open System Preferences and select Mouse from the Hardware section. Then check the box next to Force Click and haptic feedback. Now when you click with enough pressure, you should feel a slight vibration from your mouse letting you know that you've performed a successful right-click!