diff --git a/build/bakefiles/wxpresets/presets/wx_unix.bkl b/build/bakefiles/wxpresets/presets/wx_unix.bkl
index b3ab0bb4d9..278aa06a63 100644
--- a/build/bakefiles/wxpresets/presets/wx_unix.bkl
+++ b/build/bakefiles/wxpresets/presets/wx_unix.bkl
@@ -80,7 +80,7 @@ Format-specific notes:
             $(DOLLAR)(shell $(WX_CONFIG) --query-toolkit)
         </set>
         <option name="WX_PORT">
-            <values>gtk1,gtk2,msw,x11,motif,mgl,mac,dfb</values>
+            <values>gtk1,gtk2,msw,x11,motif,mgl,osx_cocoa,osx_carbon,dfb</values>
             <default-value force="1">$(WX_PORT_DEFAULT)</default-value>
             <description>
                 Port of the wx library to build against
diff --git a/wxwin.m4 b/wxwin.m4
index 9bcad852ca..4c01ae41bc 100644
--- a/wxwin.m4
+++ b/wxwin.m4
@@ -869,7 +869,8 @@ AC_DEFUN([WX_DETECT_STANDARD_OPTION_VALUES],
             WX_GTKPORT2=$(expr "$WX_SELECTEDCONFIG" : ".*gtk2.*")
             WX_MSWPORT=$(expr "$WX_SELECTEDCONFIG" : ".*msw.*")
             WX_MOTIFPORT=$(expr "$WX_SELECTEDCONFIG" : ".*motif.*")
-            WX_MACPORT=$(expr "$WX_SELECTEDCONFIG" : ".*mac.*")
+            WX_OSXCOCOAPORT=$(expr "$WX_SELECTEDCONFIG" : ".*osx_cocoa.*")
+            WX_OSXCARBONPORT=$(expr "$WX_SELECTEDCONFIG" : ".*osx_carbon.*")
             WX_X11PORT=$(expr "$WX_SELECTEDCONFIG" : ".*x11.*")
             WX_MGLPORT=$(expr "$WX_SELECTEDCONFIG" : ".*mgl.*")
             WX_DFBPORT=$(expr "$WX_SELECTEDCONFIG" : ".*dfb.*")
@@ -879,11 +880,17 @@ AC_DEFUN([WX_DETECT_STANDARD_OPTION_VALUES],
             if test "$WX_GTKPORT2" != "0"; then WX_PORT="gtk2"; fi
             if test "$WX_MSWPORT" != "0"; then WX_PORT="msw"; fi
             if test "$WX_MOTIFPORT" != "0"; then WX_PORT="motif"; fi
-            if test "$WX_MACPORT" != "0"; then WX_PORT="mac"; fi
+            if test "$WX_OSXCOCOAPORT" != "0"; then WX_PORT="osx_cocoa"; fi
+            if test "$WX_OSXCARBONPORT" != "0"; then WX_PORT="osx_carbon"; fi
             if test "$WX_X11PORT" != "0"; then WX_PORT="x11"; fi
             if test "$WX_MGLPORT" != "0"; then WX_PORT="mgl"; fi
             if test "$WX_DFBPORT" != "0"; then WX_PORT="dfb"; fi
 
+            dnl NOTE: backward-compatible check for wx2.8; in wx2.9 the mac
+            dnl       ports are called 'osx_cocoa' and 'osx_carbon' (see above)
+            WX_MACPORT=$(expr "$WX_SELECTEDCONFIG" : ".*mac.*")
+            if test "$WX_MACPORT" != "0"; then WX_PORT="mac"; fi
+
             dnl check at least one of the WX_*PORT has been set !
 
             if test "$WX_PORT" = "unknown" ; then