If you use IDA, check out the Hex-Rays Decompiler plugin is very powerful, and now available for Mac OS X users.
http://www.surrendercontrol.com/2016/02/more-ida-pro-plugins-for-os-x.html
https://github.com/REhints/HexRaysCodeXplorer/tree/master/bin/v2.0%20%5BBlackHat%20Edition%5D/IDA%20v6.8/Mac
The Hex-Rays Decompiler plugin for better code navigation in RE process. CodeXplorer automates code REconstruction of C++ applications or modern malware.
It has multiple experienced contributors:
Alex Matrosov (@matrosov)
Eugene Rodionov (@rodionov)
Rodrigo Branco (@rrbranco)
Gabriel Barbosa (@gabrielnb)
