diff --git a/Xcode/stepmania.xcodeproj/project.pbxproj b/Xcode/stepmania.xcodeproj/project.pbxproj
index a3bdafb716..94d0a52ab5 100644
--- a/Xcode/stepmania.xcodeproj/project.pbxproj
+++ b/Xcode/stepmania.xcodeproj/project.pbxproj
@@ -7896,6 +7896,7 @@
 			buildSettings = {
 				CONFIGURATION_BUILD_DIR = "$(SYMROOT)";
 				FULL_NAME = "$(PRODUCT_NAME).$(WRAPPER_EXTENSION)";
+				GCC_AUTO_VECTORIZATION = NO;
 				GCC_ENABLE_SSE3_EXTENSIONS = NO;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = NO;
 				GCC_PREFIX_HEADER = "$(SRCROOT)/../src/archutils/Darwin/StepMania.pch";
@@ -8605,6 +8606,7 @@
 				COPY_PHASE_STRIP = NO;
 				DEBUG_INFORMATION_FORMAT = stabs;
 				FULL_NAME = "$(PRODUCT_NAME).$(WRAPPER_EXTENSION)";
+				GCC_AUTO_VECTORIZATION = NO;
 				GCC_ENABLE_SSE3_EXTENSIONS = NO;
 				GCC_GENERATE_DEBUGGING_SYMBOLS = YES;
 				GCC_INLINES_ARE_PRIVATE_EXTERN = NO;
@@ -8853,7 +8855,9 @@
 			buildSettings = {
 				CONFIGURATION_BUILD_DIR = "$(SYMROOT)";
 				FULL_NAME = "$(PRODUCT_NAME).$(WRAPPER_EXTENSION)";
-				GCC_ENABLE_SSE3_EXTENSIONS = NO;
+				GCC_AUTO_VECTORIZATION = YES;
+				GCC_ENABLE_SSE3_EXTENSIONS = YES;
+				GCC_ENABLE_SUPPLEMENTAL_SSE3_INSTRUCTIONS = YES;
 				GCC_PREFIX_HEADER = "$(SRCROOT)/../src/archutils/Darwin/StepMania.pch";
 				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
@@ -8982,7 +8986,9 @@
 			buildSettings = {
 				CONFIGURATION_BUILD_DIR = "$(SYMROOT)";
 				FULL_NAME = "$(PRODUCT_NAME).$(WRAPPER_EXTENSION)";
+				GCC_AUTO_VECTORIZATION = NO;
 				GCC_ENABLE_OBJC_EXCEPTIONS = NO;
+				GCC_ENABLE_SSE3_EXTENSIONS = NO;
 				GCC_PREFIX_HEADER = "$(SRCROOT)/../src/archutils/Darwin/StepMania.pch";
 				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;