diff --git a/include/wx/mac/checklst.h b/include/wx/mac/checklst.h
index fd6ad64785..64514452fe 100644
--- a/include/wx/mac/checklst.h
+++ b/include/wx/mac/checklst.h
@@ -19,7 +19,7 @@
 
 #include "wx/listbox.h"
 
-#ifndef __MWERKS__
+#if !defined(__MWERKS__) && !defined(__MACH__)
 typedef   unsigned int  size_t;
 #endif
 
diff --git a/include/wx/mac/uma.h b/include/wx/mac/uma.h
index 9338e2715d..927be963cd 100644
--- a/include/wx/mac/uma.h
+++ b/include/wx/mac/uma.h
@@ -16,7 +16,7 @@
 
 #define UMA_USE_8_6 0 
 
-#if __POWERPC__
+#if defined(__POWERPC__) || defined(__MACH__)
 #define UMA_USE_APPEARANCE 1
 #define UMA_USE_WINDOWMGR 1
 #else