Backport to work on Leopard as well

panda/src/cocoadisplay/cocoaGraphicsStateGuardian.mm

@@ -20,6 +20,11 @@
 #import <AppKit/AppKit.h>
 #import <OpenGL/CGLRenderers.h>
 
+#ifndef kCGLRendererIDMatchingMask
+// For older versions of Mac OS X
+#define kCGLRendererIDMatchingMask   0x00FE7F00
+#endif
+
 TypeHandle CocoaGraphicsStateGuardian::_type_handle;
 
 ////////////////////////////////////////////////////////////////////

panda/src/cocoadisplay/cocoaGraphicsWindow.mm

@@ -748,7 +748,9 @@ set_properties_now(WindowProperties &properties) {
           if (_window != nil) {
             // For some reason, setting the style mask
             // makes it give up its first-responder status.
-            [_window setStyleMask:NSBorderlessWindowMask];
+            if ([_window respondsToSelector:@selector(setStyleMask:)]) {
+              [_window setStyleMask:NSBorderlessWindowMask];
+            }
             [_window makeFirstResponder:_view];
             [_window setLevel:NSMainMenuWindowLevel+1];
             [_window makeKeyAndOrderFront:nil];
@@ -889,7 +891,8 @@ set_properties_now(WindowProperties &properties) {
       // However, if we're specifying the 'undecorated' property also,
       // then we'll be setting the style mask about 25 LOC further down,
       // so we won't need to bother setting it here.
-      if (!properties.has_undecorated() && !_properties.get_undecorated()) {
+      if (!properties.has_undecorated() && !_properties.get_undecorated() &&
+          [_window respondsToSelector:@selector(setStyleMask:)]) {
         if (properties.get_fixed_size()) {
           [_window setStyleMask:NSTitledWindowMask | NSClosableWindowMask |
                                 NSMiniaturizableWindowMask ];
@@ -904,7 +907,7 @@ set_properties_now(WindowProperties &properties) {
     properties.clear_fixed_size();
   }
 
-  if (properties.has_undecorated() && _window != nil) {
+  if (properties.has_undecorated() && _window != nil && [_window respondsToSelector:@selector(setStyleMask:)]) {
     _properties.set_undecorated(properties.get_undecorated());
 
     if (!_properties.get_fullscreen()) {

panda/src/cocoadisplay/cocoaPandaWindowDelegate.h

@@ -16,7 +16,11 @@
 
 class CocoaGraphicsWindow;
 
+#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
 @interface CocoaPandaWindowDelegate : NSObject<NSWindowDelegate> {
+#else
+@interface CocoaPandaWindowDelegate : NSObject {
+#endif
   @private
     CocoaGraphicsWindow *_graphicsWindow;
 }