diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3b3f30efc..b436726f9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -190,7 +190,7 @@ IF(NOT ANDROID)
 IF(APPLE)
     # Determine the canonical name of the selected Platform SDK
     EXECUTE_PROCESS(COMMAND "defaults" "read" "${CMAKE_OSX_SYSROOT}/SDKSettings.plist" "CanonicalName"
-                    OUTPUT_VARIABLE APPLE_PLATFORM_SDK_CANONICAL_NAME
+                    OUTPUT_VARIABLE OSG_OSX_SDK_NAME
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
 
     # Trying to get CMake to generate an XCode IPhone project, current efforts are to get iphoneos sdk 3.1 working
@@ -824,18 +824,18 @@ IF(APPLE)
         # FORCE is used because the options are not reflected in the UI otherwise.
         # Seems like a good place to add version specific compiler flags too.
         IF(NOT OSG_CONFIG_HAS_BEEN_RUN_BEFORE)
-            IF(${APPLE_PLATFORM_SDK_CANONICAL_NAME} STREQUAL "macosx10.7")
+            IF(${OSG_OSX_SDK_NAME} STREQUAL "macosx10.7")
                 SET(OSG_DEFAULT_IMAGE_PLUGIN_FOR_OSX "imageio" CACHE STRING "Forced imageio default image plugin for OSX" FORCE)
                 # 64 Bit Works, PPC is not supported any more
                 SET(CMAKE_OSX_ARCHITECTURES "i386;x86_64" CACHE STRING "Build architectures for OSX" FORCE)
                 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.7 -ftree-vectorize -fvisibility-inlines-hidden" CACHE STRING "Flags used by the compiler during all build types." FORCE)
-            ELSEIF(${APPLE_PLATFORM_SDK_CANONICAL_NAME} STREQUAL "macosx10.6" /
-                   ${APPLE_PLATFORM_SDK_CANONICAL_NAME} STREQUAL "macosx10.5")
+            ELSEIF(${OSG_OSX_SDK_NAME} STREQUAL "macosx10.6" /
+                   ${OSG_OSX_SDK_NAME} STREQUAL "macosx10.5")
                 SET(OSG_DEFAULT_IMAGE_PLUGIN_FOR_OSX "imageio" CACHE STRING "Forced imageio default image plugin for OSX" FORCE)
                 # 64-bit compiles are not supported with Carbon. 
                 SET(CMAKE_OSX_ARCHITECTURES "ppc;i386" CACHE STRING "Build architectures for OSX" FORCE)
                 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.5 -ftree-vectorize -fvisibility-inlines-hidden" CACHE STRING "Flags used by the compiler during all build types." FORCE)
-            ELSEIF(${APPLE_PLATFORM_SDK_CANONICAL_NAME} STREQUAL "macosx10.4")
+            ELSEIF(${OSG_OSX_SDK_NAME} STREQUAL "macosx10.4")
                 SET(OSG_DEFAULT_IMAGE_PLUGIN_FOR_OSX "quicktime" CACHE STRING "Forced imageio default image plugin for OSX" FORCE)
                 SET(CMAKE_OSX_ARCHITECTURES "ppc;i386" CACHE STRING "Build architectures for OSX" FORCE)
                 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.4 -ftree-vectorize -fvisibility-inlines-hidden" CACHE STRING "Flags used by the compiler during all build types." FORCE)
diff --git a/src/osgViewer/CMakeLists.txt b/src/osgViewer/CMakeLists.txt
index f7092ec6e..c4e62b465 100644
--- a/src/osgViewer/CMakeLists.txt
+++ b/src/osgViewer/CMakeLists.txt
@@ -68,9 +68,9 @@ ELSE()
         IF(OSG_BUILD_PLATFORM_IPHONE OR OSG_BUILD_PLATFORM_IPHONE_SIMULATOR)
             SET(OSG_WINDOWING_SYSTEM "IOS" CACHE STRING "Windowing system type for graphics window creation, options only IOS.")
         ELSE()
-            IF(${APPLE_PLATFORM_SDK_CANONICAL_NAME} STREQUAL "macosx10.7" OR
-               ${APPLE_PLATFORM_SDK_CANONICAL_NAME} STREQUAL "macosx10.6" OR
-               ${APPLE_PLATFORM_SDK_CANONICAL_NAME} STREQUAL "macosx10.5")
+            IF(${OSG_OSX_SDK_NAME} STREQUAL "macosx10.7" OR
+               ${OSG_OSX_SDK_NAME} STREQUAL "macosx10.6" OR
+               ${OSG_OSX_SDK_NAME} STREQUAL "macosx10.5")
                 SET(OSG_WINDOWING_SYSTEM "Cocoa" CACHE STRING "Windowing system type for graphics window creation, options Carbon, Cocoa or X11.")
             ELSE()
                 SET(OSG_WINDOWING_SYSTEM "Carbon" CACHE STRING "Windowing system type for graphics window creation, options Carbon, Cocoa or X11.")