diff --git a/McBopomofo.xcodeproj/project.pbxproj b/McBopomofo.xcodeproj/project.pbxproj
index e4a61870..948b5557 100644
--- a/McBopomofo.xcodeproj/project.pbxproj
+++ b/McBopomofo.xcodeproj/project.pbxproj
@@ -826,6 +826,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_CPLUSPLUSFLAGS = (
 					"$(OTHER_CFLAGS)",
@@ -865,6 +866,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				OTHER_CPLUSPLUSFLAGS = (
 					"$(OTHER_CFLAGS)",
 					"-fcxx-modules",
@@ -1144,7 +1146,7 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GENERATE_INFOPLIST_FILE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 12.1;
+				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				MARKETING_VERSION = 1.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
@@ -1183,7 +1185,7 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GENERATE_INFOPLIST_FILE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 12.1;
+				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				MARKETING_VERSION = 1.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;