update README.macos

README.macos

@@ -12,9 +12,10 @@ You need:
 
 - Install some linphone dependencies with macports
  $ port install speex
- $ port install libosip2
- $ port install libeXosip2
+ $ port install libosip2 # WARNING: currently outdated in macport
+ $ port install libeXosip2 #WARNING: currently outdated in macport
  $ port install ffmpeg-devel
+ $ port install libvpx
  
 - Install srtp (optional) for call encryption
  $ port install srtp
@@ -23,6 +24,11 @@ You need:
  $ cd srtp && autoconf && ./configure --prefix=/opt/local && make libsrtp.a
  $ sudo make install
 
+- Install zrtpcpp (optional), for unbreakable call encryption
+ $ port install cmake
+ $ git clone git://git.linphone.org/zrtpcpp.git
+ $ cd zrtpcpp && cmake -Denable_ccrtp=false . && make
+ $ sudo make install
 
 - Install gtk. It is recommended to use the quartz backend for better integration.
  $ port install gtk2 +quartz +no_x11
@@ -44,7 +50,7 @@ If you got the source code from git, run ./autogen.sh first.
 
 Then or otherwise, do:
 	
- $ ./configure --prefix=/opt/local --with-readline=/opt/local --disable-strict --disable-x11 --with-srtp=/opt/local && make
+ $ ./configure --prefix=/opt/local --with-readline=/opt/local --disable-strict --disable-x11 --with-srtp=/opt/local --with-gsm=/opt/local --enable-zrtp && make
 
 Install to /opt/local