OS X right click/context menu via keyboard
The context menu can primarily be opened by a right mouse click (or a control click) only. 

However, if you want to right click on a specific area on the screen without using the mouse, you may use Mouse Keys from Universal Access settings in System Preferences. With it, you can control the mouse by using the keyboard number pad. When activated, a right mouse click then can be achieved by Ctrl+5 on a keyboard with a numpad or Fn+Ctrl+i on a laptop. This will allow you to 'right-click' your word.

Go to System Preferences --> Universal Access --> Mouse --> Enable Mouse Keys (ON)


Found on: https://stackoverflow.com/a/11238186/1919382