diff --git a/platforms/iOS/vm/OSX/sqSqueakOSXOpenGLView.m b/platforms/iOS/vm/OSX/sqSqueakOSXOpenGLView.m
index a50adb3e96..65474ad5b8 100644
--- a/platforms/iOS/vm/OSX/sqSqueakOSXOpenGLView.m
+++ b/platforms/iOS/vm/OSX/sqSqueakOSXOpenGLView.m
@@ -1114,27 +1114,20 @@ - (void) clearScreen {
 
 - (void)  ioSetFullScreen: (sqInt) fullScreen {
 
-	if ([self isInFullScreenMode] == YES && (fullScreen == 1))
+	if ((self.window.styleMask & NSFullScreenWindowMask) && (fullScreen == 1))
 		return;
-	if ([self isInFullScreenMode] == NO && (fullScreen == 0))
+	if (!(self.window.styleMask & NSFullScreenWindowMask) && (fullScreen == 0))
 		return;
 
-	if ([self isInFullScreenMode] == NO && (fullScreen == 1)) {
-       self.fullScreenInProgress = YES;
-		NSDictionary* options = [NSDictionary dictionaryWithObjectsAndKeys:
-			[NSNumber numberWithInt:
-				NSApplicationPresentationHideDock |
-				NSApplicationPresentationHideMenuBar ],
-			NSFullScreenModeApplicationPresentationOptions, nil];
-		[self enterFullScreenMode:[NSScreen mainScreen] withOptions:options];
+	if (!(self.window.styleMask & NSFullScreenWindowMask) && (fullScreen == 1)) {
+         self.fullScreenInProgress = YES;
+
+        [self.window toggleFullScreen: nil];
 	}
 
-	if ([self isInFullScreenMode] == YES && (fullScreen == 0)) {
+	if ((self.window.styleMask & NSFullScreenWindowMask) && (fullScreen == 0)) {
         self.fullScreenInProgress = YES;
-		[self exitFullScreenModeWithOptions: NULL];
-		if ([self.window isKeyWindow] == NO) {
-			[self.window makeKeyAndOrderFront: self];
-		}
+        [self.window toggleFullScreen: nil];        
 	}
 }