diff --git a/mac_build/boinc.xcodeproj/project.pbxproj b/mac_build/boinc.xcodeproj/project.pbxproj
index 6d970297ce..d9f41c6dc4 100755
--- a/mac_build/boinc.xcodeproj/project.pbxproj
+++ b/mac_build/boinc.xcodeproj/project.pbxproj
@@ -3961,7 +3961,7 @@
 				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				GCC_WARN_TYPECHECK_CALLS_TO_PRINTF = NO;
 				LIBRARY_STYLE = STATIC;
-				MACOSX_DEPLOYMENT_TARGET = 10.4;
+				MACOSX_DEPLOYMENT_TARGET = 10.5;
 				"MACOSX_DEPLOYMENT_TARGET[arch=ppc]" = 10.4;
 				"MACOSX_DEPLOYMENT_TARGET[arch=x86_64]" = 10.5;
 				OTHER_CFLAGS = (
@@ -4129,7 +4129,7 @@
 				GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS = NO;
 				GCC_WARN_TYPECHECK_CALLS_TO_PRINTF = NO;
 				LIBRARY_STYLE = STATIC;
-				MACOSX_DEPLOYMENT_TARGET = 10.4;
+				MACOSX_DEPLOYMENT_TARGET = 10.5;
 				"MACOSX_DEPLOYMENT_TARGET[arch=ppc]" = 10.4;
 				"MACOSX_DEPLOYMENT_TARGET[arch=x86_64]" = 10.5;
 				OTHER_CFLAGS = (