Borderless NSWindow

gistfile1.txt

- (id)initWithContentRect:(NSRect)contentRect 
                styleMask:(NSUInteger)windowStyle 
                  backing:(NSBackingStoreType)bufferingType 
                    defer:(BOOL)deferCreation
{
  [super initWithContentRect:contentRect 
                   styleMask:NSBorderlessWindowMask 
                     backing:bufferingType 
                       defer:deferCreation];

  [self setBackgroundColor:[NSColor clearColor]];
  [self setOpaque:NO];
  [self setAllowsConcurrentViewDrawing:YES];
  [self setAcceptsMouseMovedEvents:YES];
  [self setHasShadow:NO];
  [self setLevel:NSFloatingWindowLevel];
  
  
  CGFloat pointX = ([[NSScreen mainScreen] frame].size.width - [self frame].size.width) - 20;
  CGFloat pointY = ([[NSScreen mainScreen] frame].size.height - [self frame].size.height) - 30;
  
  [self setFrameOrigin:NSMakePoint(pointX, pointY)];
  
  return self;
}