diff --git a/src/macosx/stella.xcodeproj/project.pbxproj b/src/macosx/stella.xcodeproj/project.pbxproj
index 0595f2494..0a9862bac 100644
--- a/src/macosx/stella.xcodeproj/project.pbxproj
+++ b/src/macosx/stella.xcodeproj/project.pbxproj
@@ -1802,10 +1802,12 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
+				DEBUG_INFORMATION_FORMAT = dwarf;
 				FRAMEWORK_SEARCH_PATHS = (
 					.,
 					"$(HOME)/Library/Frameworks",
 				);
+				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_VERSION = 4.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.4;
 				SDKROOT = macosx10.4;
@@ -1832,6 +1834,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_32_BIT)";
+				GCC_OPTIMIZATION_LEVEL = 3;
 				GCC_VERSION = 4.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.4;
 				SDKROOT = macosx10.4;
diff --git a/src/macosx/stella_intel.xcodeproj/project.pbxproj b/src/macosx/stella_intel.xcodeproj/project.pbxproj
index 76e4d7871..300f229b0 100644
--- a/src/macosx/stella_intel.xcodeproj/project.pbxproj
+++ b/src/macosx/stella_intel.xcodeproj/project.pbxproj
@@ -1804,7 +1804,7 @@
 		2D91752209BA903B0026E9FF /* Development */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
 				COPY_PHASE_STRIP = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				FRAMEWORK_SEARCH_PATHS = (
@@ -1820,7 +1820,7 @@
 		2D91752309BA903B0026E9FF /* Deployment */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
 				FRAMEWORK_SEARCH_PATHS = (
 					.,
 					"$(HOME)/Library/Frameworks",
@@ -1836,7 +1836,7 @@
 		2D91752409BA903B0026E9FF /* Default */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				MACOSX_DEPLOYMENT_TARGET = 10.4;
 				SDKROOT = macosx10.4;