Unable to install plugin on a mac

Hello,

I found this video, where a gentleman very clearly explains how to add a custom plugin to your project (starting from 1:35):

https://www…com/watch?v=zRURG4Zp0Zo#t=19

I did those exact steps, using those exact files (which you can download here: Plugin - C++ - Epic Developer Community Forums), but on a mac, not a windows.

response I get from editor is this:

13733-screen+shot+2014-08-26+at+12.31.46.png

And then editor just closes. I really need to add a custom plugin, can somebody please help me ?
Thank you.