Note that you cannot use Xcode 4 or later to build the 32-bit target (wxMac).
So you need access to Xcode 3.2.6 and the old MacOSX10.6.sdk to build this...
All new OS X development needs to target wxWidgets 3 instead, for 64-bit support.
Then you will have new interesting issues with wxOSX, instead of these old ones.