diff --git a/Headers/AppKit/NSPasteboard.h b/Headers/AppKit/NSPasteboard.h
index 40188c3fa..e34c12fca 100644
--- a/Headers/AppKit/NSPasteboard.h
+++ b/Headers/AppKit/NSPasteboard.h
@@ -193,6 +193,10 @@ APPKIT_EXPORT NSString *const NSPasteboardTypeMultipleTextSelection;
 #if OS_API_VERSION(MAC_OS_X_VERSION_10_7, GS_API_LATEST)
 APPKIT_EXPORT NSString *const NSPasteboardTypeTextFinderOptions;
 #endif
+
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_13, GS_API_LATEST)
+typedef NSString *NSPasteboardType;
+#endif
 #endif
 
 
diff --git a/Headers/AppKit/NSProgressIndicator.h b/Headers/AppKit/NSProgressIndicator.h
index 13f3d8c81..6ee36316c 100644
--- a/Headers/AppKit/NSProgressIndicator.h
+++ b/Headers/AppKit/NSProgressIndicator.h
@@ -51,7 +51,11 @@ typedef enum _NSProgressIndicatorThickness
 typedef enum _NSProgressIndicatorStyle
 {
   NSProgressIndicatorBarStyle = 0,
-  NSProgressIndicatorSpinningStyle = 1
+  NSProgressIndicatorSpinningStyle = 1,
+  #if OS_API_VERSION(MAC_OS_X_VERSION_10_13, GS_API_LATEST)
+  NSProgressIndicatorStyleBar = 0,
+  NSProgressIndicatorStyleSpinning = 1
+  #endif
 } NSProgressIndicatorStyle;
 
 APPKIT_EXPORT_CLASS
diff --git a/Headers/AppKit/NSViewController.h b/Headers/AppKit/NSViewController.h
index 04d2365fa..3498f9358 100644
--- a/Headers/AppKit/NSViewController.h
+++ b/Headers/AppKit/NSViewController.h
@@ -96,7 +96,12 @@ APPKIT_EXPORT_CLASS
 - (void) viewDidAppear: (BOOL)animated;
 - (void) viewWillDisappear: (BOOL)animated;
 - (void) viewDidDisappear: (BOOL)animated;
-
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_10, GS_API_LATEST)
+- (void) viewWillAppear;
+- (void) viewDidAppear;
+- (void) viewWillDisappear;
+- (void) viewDidDisappear;
+#endif
 #if OS_API_VERSION(MAC_OS_X_VERSION_10_10, GS_API_LATEST)
 - (void) dismissViewController: (NSViewController *)viewController;
 - (void) dismissController: (id)sender;
diff --git a/Source/NSViewController.m b/Source/NSViewController.m
index df46db2ad..b586ec777 100644
--- a/Source/NSViewController.m
+++ b/Source/NSViewController.m
@@ -83,6 +83,7 @@ - (void)viewDidLoad
 
 - (void) viewWillAppear: (BOOL)animated
 {
+  [self viewWillAppear];
 }
 
 - (void) viewIsAppearing: (BOOL)animated
@@ -91,13 +92,32 @@ - (void) viewIsAppearing: (BOOL)animated
 
 - (void) viewDidAppear: (BOOL)animated
 {
+  [self viewDidAppear];
 }
 
 - (void) viewWillDisappear: (BOOL)animated
 {
+  [self viewWillDisappear];
 }
 
 - (void) viewDidDisappear: (BOOL)animated
+{
+  [self viewDidDisappear];
+}
+
+- (void) viewWillAppear
+{
+}
+
+- (void) viewWillDisappear
+{
+}
+
+- (void) viewDidAppear
+{
+}
+
+- (void) viewDidDisappear
 {
 }