diff --git a/deps/tinycthread.h b/deps/tinycthread.h
index 6da30d70..42958c39 100644
--- a/deps/tinycthread.h
+++ b/deps/tinycthread.h
@@ -123,7 +123,9 @@ typedef int _tthread_clockid_t;
 /* Emulate clock_gettime */
 int _tthread_clock_gettime(clockid_t clk_id, struct timespec *ts);
 #define clock_gettime _tthread_clock_gettime
-#define CLOCK_REALTIME 0
+#ifndef CLOCK_REALTIME
+  #define CLOCK_REALTIME 0
+#endif
 #endif
 
 
diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index 57032b56..ddd3edad 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -63,14 +63,15 @@ static NSUInteger getStyleMask(_GLFWwindow* window)
     NSUInteger styleMask = 0;
 
     if (window->monitor || !window->decorated)
-        styleMask |= NSBorderlessWindowMask;
+        styleMask |= NSWindowStyleMaskBorderless;
     else
     {
-        styleMask |= NSTitledWindowMask | NSClosableWindowMask |
-                     NSMiniaturizableWindowMask;
+        styleMask |= NSWindowStyleMaskTitled |
+                     NSWindowStyleMaskClosable |
+                     NSWindowStyleMaskMiniaturizable;
 
         if (window->resizable)
-            styleMask |= NSResizableWindowMask;
+            styleMask |= NSWindowStyleMaskResizable;
     }
 
     return styleMask;
@@ -150,13 +151,13 @@ static int translateFlags(NSUInteger flags)
 {
     int mods = 0;
 
-    if (flags & NSShiftKeyMask)
+    if (flags & NSEventModifierFlagShift)
         mods |= GLFW_MOD_SHIFT;
-    if (flags & NSControlKeyMask)
+    if (flags & NSEventModifierFlagControl)
         mods |= GLFW_MOD_CONTROL;
-    if (flags & NSAlternateKeyMask)
+    if (flags & NSEventModifierFlagOption)
         mods |= GLFW_MOD_ALT;
-    if (flags & NSCommandKeyMask)
+    if (flags & NSEventModifierFlagCommand)
         mods |= GLFW_MOD_SUPER;
 
     return mods;
@@ -180,16 +181,16 @@ static NSUInteger translateKeyToModifierFlag(int key)
     {
         case GLFW_KEY_LEFT_SHIFT:
         case GLFW_KEY_RIGHT_SHIFT:
-            return NSShiftKeyMask;
+            return NSEventModifierFlagShift;
         case GLFW_KEY_LEFT_CONTROL:
         case GLFW_KEY_RIGHT_CONTROL:
-            return NSControlKeyMask;
+            return NSEventModifierFlagControl;
         case GLFW_KEY_LEFT_ALT:
         case GLFW_KEY_RIGHT_ALT:
-            return NSAlternateKeyMask;
+            return NSEventModifierFlagOption;
         case GLFW_KEY_LEFT_SUPER:
         case GLFW_KEY_RIGHT_SUPER:
-            return NSCommandKeyMask;
+            return NSEventModifierFlagCommand;
     }
 
     return 0;
@@ -565,7 +566,7 @@ static const NSRange kEmptyRange = { NSNotFound, 0 };
 {
     int action;
     const unsigned int modifierFlags =
-        [event modifierFlags] & NSDeviceIndependentModifierFlagsMask;
+        [event modifierFlags] & NSEventModifierFlagDeviceIndependentFlagsMask;
     const int key = translateKey([event keyCode]);
     const int mods = translateFlags(modifierFlags);
     const NSUInteger keyFlag = translateKeyToModifierFlag(key);
@@ -760,7 +761,7 @@ static const NSRange kEmptyRange = { NSNotFound, 0 };
 
 - (BOOL)canBecomeKeyWindow
 {
-    // Required for NSBorderlessWindowMask windows
+    // Required for NSWindowStyleMaskBorderless windows
     return YES;
 }
 
@@ -781,8 +782,11 @@ static const NSRange kEmptyRange = { NSNotFound, 0 };
 // down the command key don't get sent to the key window.
 - (void)sendEvent:(NSEvent *)event
 {
-    if ([event type] == NSKeyUp && ([event modifierFlags] & NSCommandKeyMask))
+    if ([event type] == NSEventTypeKeyUp &&
+        ([event modifierFlags] & NSEventModifierFlagCommand))
+    {
         [[self keyWindow] sendEvent:event];
+    }
     else
         [super sendEvent:event];
 }
@@ -866,7 +870,7 @@ static void createMenuBar(void)
     [[appMenu addItemWithTitle:@"Hide Others"
                        action:@selector(hideOtherApplications:)
                 keyEquivalent:@"h"]
-        setKeyEquivalentModifierMask:NSAlternateKeyMask | NSCommandKeyMask];
+        setKeyEquivalentModifierMask:NSEventModifierFlagOption | NSEventModifierFlagCommand];
     [appMenu addItemWithTitle:@"Show All"
                        action:@selector(unhideAllApplications:)
                 keyEquivalent:@""];
@@ -898,7 +902,7 @@ static void createMenuBar(void)
     [[windowMenu addItemWithTitle:@"Enter Full Screen"
                            action:@selector(toggleFullScreen:)
                     keyEquivalent:@"f"]
-     setKeyEquivalentModifierMask:NSControlKeyMask | NSCommandKeyMask];
+     setKeyEquivalentModifierMask:NSEventModifierFlagControl | NSEventModifierFlagCommand];
 
     // Prior to Snow Leopard, we need to use this oddly-named semi-private API
     // to get the application menu working properly.
@@ -1358,7 +1362,7 @@ void _glfwPlatformPollEvents(void)
 {
     for (;;)
     {
-        NSEvent* event = [NSApp nextEventMatchingMask:NSAnyEventMask
+        NSEvent* event = [NSApp nextEventMatchingMask:NSEventMaskAny
                                             untilDate:[NSDate distantPast]
                                                inMode:NSDefaultRunLoopMode
                                               dequeue:YES];
@@ -1377,7 +1381,7 @@ void _glfwPlatformWaitEvents(void)
     // I wanted to pass NO to dequeue:, and rely on PollEvents to
     // dequeue and send.  For reasons not at all clear to me, passing
     // NO to dequeue: causes this method never to return.
-    NSEvent *event = [NSApp nextEventMatchingMask:NSAnyEventMask
+    NSEvent *event = [NSApp nextEventMatchingMask:NSEventMaskAny
                                         untilDate:[NSDate distantFuture]
                                            inMode:NSDefaultRunLoopMode
                                           dequeue:YES];
@@ -1389,7 +1393,7 @@ void _glfwPlatformWaitEvents(void)
 void _glfwPlatformWaitEventsTimeout(double timeout)
 {
     NSDate* date = [NSDate dateWithTimeIntervalSinceNow:timeout];
-    NSEvent* event = [NSApp nextEventMatchingMask:NSAnyEventMask
+    NSEvent* event = [NSApp nextEventMatchingMask:NSEventMaskAny
                                         untilDate:date
                                            inMode:NSDefaultRunLoopMode
                                           dequeue:YES];
@@ -1402,7 +1406,7 @@ void _glfwPlatformWaitEventsTimeout(double timeout)
 void _glfwPlatformPostEmptyEvent(void)
 {
     NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
-    NSEvent* event = [NSEvent otherEventWithType:NSApplicationDefined
+    NSEvent* event = [NSEvent otherEventWithType:NSEventTypeApplicationDefined
                                         location:NSMakePoint(0, 0)
                                    modifierFlags:0
                                        timestamp:0
diff --git a/src/nsgl_context.m b/src/nsgl_context.m
index 454a7739..6c1f5a20 100644
--- a/src/nsgl_context.m
+++ b/src/nsgl_context.m
@@ -225,7 +225,15 @@ GLFWbool _glfwCreateContextNSGL(_GLFWwindow* window,
         ADD_ATTR2(NSOpenGLPFAStencilSize, fbconfig->stencilBits);
 
     if (fbconfig->stereo)
+    {
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101200
+        _glfwInputError(GLFW_FORMAT_UNAVAILABLE,
+                        "NSGL: Stereo rendering is deprecated");
+        return GLFW_FALSE;
+#else
         ADD_ATTR(NSOpenGLPFAStereo);
+#endif
+    }
 
     if (fbconfig->doublebuffer)
         ADD_ATTR(NSOpenGLPFADoubleBuffer);