diff --git a/build/osx/wxcarbon.xcconfig b/build/osx/wxcarbon.xcconfig
index 34b5d8001a..66484a823a 100644
--- a/build/osx/wxcarbon.xcconfig
+++ b/build/osx/wxcarbon.xcconfig
@@ -3,10 +3,10 @@ WXTOOLKITUPPER = CARBON
 
 #include "wx.xcconfig"
 
-MACOSX_DEPLOYMENT_TARGET = 10.4
+MACOSX_DEPLOYMENT_TARGET = 10.5
+SDKROOT = macosx
 
 GCC_VERSION = 4.2
-GCC_VERSION[arch=ppc] = 4.0
 
 ARCHS = ppc i386