I am using Monodevelop-Unity (5.9.6) for my game on OS X ElCaptain.
In OSX, Monodevelop editor can popup autocompletion template whenever pressing ctr + space as shown in the image. .
However there seems no way to select the template and insert on the code. Note we can manually insert the template using Edit>Insert template....
In Visual Studio I am able to add a template after pressing Tab key two times
For example, write
for and then presssed two times Tab key.