diff --git a/Examples/CalendarSample/CalendarSample.xcodeproj/project.pbxproj b/Examples/CalendarSample/CalendarSample.xcodeproj/project.pbxproj
index 54397145c..811849fc6 100644
--- a/Examples/CalendarSample/CalendarSample.xcodeproj/project.pbxproj
+++ b/Examples/CalendarSample/CalendarSample.xcodeproj/project.pbxproj
@@ -393,7 +393,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
@@ -437,7 +437,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
 					"-Wall",
diff --git a/Examples/DriveSample/DriveSample.xcodeproj/project.pbxproj b/Examples/DriveSample/DriveSample.xcodeproj/project.pbxproj
index c6fbfc7e9..7e476155f 100644
--- a/Examples/DriveSample/DriveSample.xcodeproj/project.pbxproj
+++ b/Examples/DriveSample/DriveSample.xcodeproj/project.pbxproj
@@ -97,7 +97,7 @@
 			name = Products;
 			sourceTree = "<group>";
 		};
-		29B97314FDCFA39411CA2CEA = {
+		29B97314FDCFA39411CA2CEA /* CalendarSample */ = {
 			isa = PBXGroup;
 			children = (
 				080E96DDFE201D6D7F000001 /* Sample App Classes */,
@@ -187,7 +187,7 @@
 				en,
 				Base,
 			);
-			mainGroup = 29B97314FDCFA39411CA2CEA;
+			mainGroup = 29B97314FDCFA39411CA2CEA /* CalendarSample */;
 			productRefGroup = 19C28FACFE9D520D11CA2CBB /* Products */;
 			projectDirPath = "";
 			projectRoot = "";
@@ -377,7 +377,7 @@
 					../../Source/OAuth2/Mac,
 					../../Source/Objects,
 				);
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
@@ -429,7 +429,7 @@
 					../../Source/OAuth2/Mac,
 					../../Source/Objects,
 				);
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
 					"-Wall",
diff --git a/Examples/StorageSample/StorageSample.xcodeproj/project.pbxproj b/Examples/StorageSample/StorageSample.xcodeproj/project.pbxproj
index 0e27b349a..9c9926ba6 100644
--- a/Examples/StorageSample/StorageSample.xcodeproj/project.pbxproj
+++ b/Examples/StorageSample/StorageSample.xcodeproj/project.pbxproj
@@ -377,7 +377,7 @@
 					../../Source/OAuth2/Mac,
 					../../Source/Objects,
 				);
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
@@ -429,7 +429,7 @@
 					../../Source/OAuth2/Mac,
 					../../Source/Objects,
 				);
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
 					"-Wall",
diff --git a/Examples/YouTubeSample/YouTubeSample.xcodeproj/project.pbxproj b/Examples/YouTubeSample/YouTubeSample.xcodeproj/project.pbxproj
index 61c56b8b5..e2b46f6ba 100644
--- a/Examples/YouTubeSample/YouTubeSample.xcodeproj/project.pbxproj
+++ b/Examples/YouTubeSample/YouTubeSample.xcodeproj/project.pbxproj
@@ -361,7 +361,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
@@ -405,7 +405,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				SDKROOT = macosx;
 				WARNING_CFLAGS = (
 					"-Wall",