Hello, First I wish happy new year to everybody. I made the work to use Intel IPP with pjsip on Mac OS X. I gave all informations on this page : http://code.google.com/p/siphon/wiki/IPPwithPjMediaOnMacOSX. I kept the same structure of pjsip page (http://trac.pjsip.org/repos/wiki/Intel_IPP_Codecs) for Windows et Linux. I hope this instructions will be useful and I didn't forget anything. Best regards Samuel