If you are using a MAC, here is how to enable right click.

Here is how to enable right click on a track pad:

1. Go to the Apple menu and select System Preferences. 
2. Click on the Track pad pane. 
3. Choose the Point & Click tab.
4. Check the box next to secondary click.
5. Click on the little down arrow.
6. Choose Click with two fingers; Click in bottom right corner; or Click in bottom left corner. 

How to right click on a Mac mouse 

1. Launch System Preferences from the Apple menu or by clicking it in the Dock. 
2. Click on the Mouse pane. 
3. Click on the Point & Click tab. 
4. Check the box next to Secondary click. 
5. Choose ‘Click on the right side’ to enable right-click on a Mac mouse.