How to create logical groups inside a context menu.

I want to create logical groups inside my Finder Extension context Menu.

http://stackoverflow.com/questions/42537343/how-to-create-logical-groups-inside-a-context-menu-mac-os/42541596?noredirect=1#comment72302097_42541596

The discussion on the aforementioned StackOverflow thread suggests that the

[NSMenuItem separatorItem]

behaves inconsistently for me and another user.

While for me it creates a blank space, for the other user it draws a horizontal line between the menu items ( This is what i want to achieve).