diff --git a/Xcode/OpenSceneGraph/OpenSceneGraph.xcodeproj/project.pbxproj b/Xcode/OpenSceneGraph/OpenSceneGraph.xcodeproj/project.pbxproj
index 9af69fd03..4864d424b 100644
--- a/Xcode/OpenSceneGraph/OpenSceneGraph.xcodeproj/project.pbxproj
+++ b/Xcode/OpenSceneGraph/OpenSceneGraph.xcodeproj/project.pbxproj
@@ -25976,10 +25976,18 @@
 				GCC_WARN_UNKNOWN_PRAGMAS = NO;
 				INFOPLIST_FILE = "osgDB-Info.plist";
 				INSTALL_PATH = "@executable_path/../Frameworks";
+				OTHER_CFLAGS = (
+					"-DUSE_DARWIN_COCOA_IMPLEMENTATION",
+					"-DDARWIN_IMAGEIO",
+					"$(OTHER_CFLAGS_QUOTED_FOR_TARGET_1)",
+				);
+				OTHER_CFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_CPLUSPLUSFLAGS = (
 					"-DDARWIN_IMAGEIO",
 					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1)",
 				);
+				OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_REZFLAGS = "";
 				PRODUCT_NAME = osgDB;
 				REZ_EXECUTABLE = NO;
@@ -26007,10 +26015,18 @@
 				GCC_WARN_UNKNOWN_PRAGMAS = NO;
 				INFOPLIST_FILE = "osgDB-Info.plist";
 				INSTALL_PATH = "@executable_path/../Frameworks";
+				OTHER_CFLAGS = (
+					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"-DUSE_DARWIN_CARBON_IMPLEMENTATION",
+					"$(OTHER_CFLAGS_QUOTED_FOR_TARGET_1)",
+				);
+				OTHER_CFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_CPLUSPLUSFLAGS = (
 					"-DDARWIN_IMAGEIO",
 					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1)",
 				);
+				OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_REZFLAGS = "";
 				PRODUCT_NAME = osgDB;
 				REZ_EXECUTABLE = NO;
@@ -38875,10 +38891,13 @@
 				GCC_WARN_UNKNOWN_PRAGMAS = NO;
 				INFOPLIST_FILE = "osgDB-Info.plist";
 				INSTALL_PATH = "@executable_path/../Frameworks";
+				OTHER_CFLAGS = "-DUSE_DARWIN_COCOA_IMPLEMENTATION";
 				OTHER_CPLUSPLUSFLAGS = (
 					"-DDARWIN_IMAGEIO",
 					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1)",
 				);
+				OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_REZFLAGS = "";
 				PRODUCT_NAME = osgDB;
 				REZ_EXECUTABLE = NO;
@@ -43909,10 +43928,16 @@
 				GCC_WARN_UNKNOWN_PRAGMAS = NO;
 				INFOPLIST_FILE = "osgDB-Info.plist";
 				INSTALL_PATH = "@executable_path/../Frameworks";
+				OTHER_CFLAGS = (
+					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"-DUSE_DARWIN_COCOA_IMPLEMENTATION",
+				);
 				OTHER_CPLUSPLUSFLAGS = (
 					"-DDARWIN_IMAGEIO",
 					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1)",
 				);
+				OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_REZFLAGS = "";
 				PRODUCT_NAME = osgDB;
 				REZ_EXECUTABLE = NO;
@@ -48893,10 +48918,17 @@
 				GCC_WARN_UNKNOWN_PRAGMAS = NO;
 				INFOPLIST_FILE = "osgDB-Info.plist";
 				INSTALL_PATH = "@executable_path/../Frameworks";
+				OTHER_CFLAGS = (
+					"-DUSE_DARWIN_CARBON_IMPLEMENTATION",
+					"$(OTHER_CFLAGS_QUOTED_FOR_TARGET_1)",
+				);
+				OTHER_CFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_CPLUSPLUSFLAGS = (
 					"-DDARWIN_IMAGEIO",
 					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1)",
 				);
+				OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_REZFLAGS = "";
 				PRODUCT_NAME = osgDB;
 				REZ_EXECUTABLE = NO;
@@ -54922,10 +54954,17 @@
 				GCC_WARN_UNKNOWN_PRAGMAS = NO;
 				INFOPLIST_FILE = "osgDB-Info.plist";
 				INSTALL_PATH = "@executable_path/../Frameworks";
+				OTHER_CFLAGS = (
+					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"-DUSE_DARWIN_COCOA_IMPLEMENTATION",
+					"-DDARWIN_IMAGEIO",
+				);
 				OTHER_CPLUSPLUSFLAGS = (
 					"-DDARWIN_IMAGEIO",
 					"-DGLU_TESS_CALLBACK_TRIPLEDOT",
+					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1)",
 				);
+				OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1 = "-DOSG_PLUGIN_EXTENSION=\".so\"";
 				OTHER_REZFLAGS = "";
 				PRODUCT_NAME = osgDB;
 				REZ_EXECUTABLE = NO;