X-Git-Url: http://nitlanguage.org

diff --git a/README.md b/README.md
index 0df1fcc..2679f4d 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ Requirements:
  * gcc		http://gcc.gnu.org/ (or a compatible C compiler)
  * pkg-config	http://www.freedesktop.org/wiki/Software/pkg-config/
  * ccache	http://ccache.samba.org/	to improve recompilation
- * libgc-dev	http://www.hpl.hp.com/personal/Hans_Boehm/gc/
+ * libgc-dev	http://hboehm.info/gc/
  * graphviz	http://www.graphviz.org/	to enable graphs with the nitdoc tool
  * libunwind	http://nongnu.org/libunwind
 
@@ -26,6 +26,14 @@ Those are available in most Linux distributions
 
     $ sudo apt-get install build-essential ccache libgc-dev graphviz libunwind-dev pkg-config
 
+and on OS X using brew
+
+    $ brew install ccache bdw-gc graphviz libunwind-headers pkgconfig
+
+or with MacPorts
+
+    $ sudo port install ccache boehmgc graphviz libunwind-headers pkgconfig
+
 Important files and directories:
 
  * benchmarks/	Script to bench the compilers
@@ -57,4 +65,14 @@ To have your environment automatically configured at login, just source it with
 
     $ . misc/nit_env.sh install
 
-More information: <http://www.nitlanguage.org>
+Contributing:
+
+To contribute to Nit, please see [CONTRIBUTING](CONTRIBUTING.md).
+
+The best way to ask the team for advice, submit bugs or request features, is through the use of Github issues, using the appropriate tag (`forum`, `feature-request`, `bug`).
+
+Information, contacts and help:
+
+* Website <http://www.nitlanguage.org>
+* Issues <https://github.com/nitlang/nit/issues>
+* Chatroom <https://gitter.im/nitlang/nit>