How to properly install freetype2 devel package? I wish to install freetype 2 dev package so I can use the fontconvert tool in Adafruit-GFX-Library

Here is what I get

$make fontconvert
fontconvert.c:22:10: fatal error: 'ft2build.h' file not found
#include &lt;ft2build.h&gt;
         ^~~~~~~~~~~~
1 error generated.
make: *** [fontconvert] Error 1


The community says that it because I haven't installed freetype 2 dev properly 
https://github.com/adafruit/Adafruit-GFX-Library/issues/224

(I used brew install freetype to get freetype ?1?)

Tried to follow these instructions:

https://opensource.ncsa.illinois.edu/confluence/pages/viewpage.action?pageId=61604031

But it just created a folder with all the files - I think that they should be located at another directory - but don't know where..
Found that I needed xcode to install all dependencies (prompted me when I opened xcode). It seems to be working now..