diff --git a/Cocoa.m b/Cocoa.m
index cb159e5..3b382bb 100644
--- a/Cocoa.m
+++ b/Cocoa.m
@@ -73,6 +73,9 @@ - (void) prepareOpenGL {
 		
 	[[self window] setLevel: NSNormalWindowLevel];
 	[[self window] makeKeyAndOrderFront: self];
+
+	// Activate the application (i.e. give it focus).
+	[NSApp activateIgnoringOtherApps:YES];
 	
 	// Make all the OpenGL calls to setup rendering and build the necessary rendering objects
 	[[self openGLContext] makeCurrentContext];
diff --git a/README.md b/README.md
index 52363ac..112f80a 100644
--- a/README.md
+++ b/README.md
@@ -1207,6 +1207,9 @@ static CVReturn GlobalDisplayLinkCallback(CVDisplayLinkRef, const CVTimeStamp*,
 		
 	[[self window] setLevel: NSNormalWindowLevel];
 	[[self window] makeKeyAndOrderFront: self];
+
+	// Activate the application (i.e. give it focus).
+	[NSApp activateIgnoringOtherApps:YES];
 	
 	// Make all the OpenGL calls to setup rendering and build the necessary rendering objects
 	[[self openGLContext] makeCurrentContext];